Necrotisis' Guide to CSing Senna ADC
Quick Senna AD ADC Build
Best Overall Build
This guide is for CSing Senna adc. If you want a Senna support guide, this isn't the place, although the things I mention here may apply to Senna support.
The runes and build shown above is generally the best Senna ADC build, with variations on the Runes and Items shown below.
The lack of a potion in the "Starting Items" section above is not a mistake, there isn't much point to wasting the 50 gold if your Q can sustain you just fine. If you want you can opt into the potion for more poke heavy lanes.
DO NOT START TEAR - The item leaves you incredibly weak in lane, so even though you have more mana for Q you end up having to spend most of it healing up since you're consistently getting out-traded by the the enemy bot lane.
The entire goal of playing Senna adc is to CS well and hit your items faster than your opponent due to the occasional 8 gold from soul drops, as well as being able to build a non-crit item with your kraken and IE and still have 60% crit for IE when you finish it.
If you don't enjoy hyperscaling, dont play Senna, and especially don't play Senna ADC. You will be insanely bored.
Below is my standard damage focused Press the Attack/Sorcery rune page, a more defense/sustain oriented Fleet Footwork/Resolve set, the most popular internet set, and a First Strike/Precision set.
- Press the Attack
- Fleet Footwork
- First Strike
Note, these pages are not always the best, sometimes minor adjustments are good based on your team, the enemy team, or your personal playstyle and preference. The most viable changes are listed below in no particular order.
Press the Attack or Fleet Footwork: Take fleet if you need the sustain. Generally though, Press the Attack is better just due to the increased damage and trading potency. You don't generally have enough time to stack Conqueror and Lethal Tempo is just not worth it to Senna, the attack speed is worthless and the 75 range takes too long to stack up to for it to have much value.
Overheal and Triumph versus Presence of Mind: Overheal and Triumph are both sometimes useful, and overheal will block a lot of damage and triumph will heal you a lot, but in general the mana restore on takedown will help you have enough mana throughout late game teamfights, making presence generally the best option.
Bloodline is in my opinion the best. You want the healing on each autoattack and your Q applies lifesteal at 100% effectiveness to everything it hits, which can make your self healing ridiculous later in the game. You should NEVER take alacrity, it's a terrible rune for Senna, amounting to about 0.05 attacks per second at the full 18% bonus, which is 1/20th of an attack per second. Even accounting for the reduction in Q cast time, it's not worth it. Tenacity may actually be super worth it. The stats on bloodline are worth more than alacrity for Senna by leaps and bounds, but 6% lifesteal and 100 max hp on senna are realistically not that amazing. There are definitely games where the tenacity will do more for you than the lifesteal and health, so maybe consider taking it.
Cut Down: Do not replace this unless you are planning on building max health items. My Cut Down often does more damage than my Press the Attack, consistently hitting upwards of 1,000 damage every 10 minutes in most of my games, with the ones going past 30 minutes being even higher than that.
Some people like to go First Strike as a Keystone, and while I personally think it's not worth it, especially not with the recent nerf, the only rune you can viably change from the example page is the second row of inspiration, since all three options (Future's Market, Minion Dematerializer, or Biscuit Delivery) are viable.
Personally I always go sorcery.
Absolute Focus is insanely good for Senna since you're almost always above 70% health, and it makes your autos do that much more damage.
Gathering Storm is the second best rune you can take on Senna ADC, second only to Cut Down. It makes your scaling insanely consistent and is worth a ton of damage as the game starts to go later and later.
Celerity and Nimbus Cloak can be viably swapped (generally instead of Absolute Focus) if you want slightly better movement speed in general or movespeed on escapes using summoner spells respectively. If you go Celerity, it may be smart to consider going Youmuu's Ghostblade and/or Phantom Dancer in your build, as the movespeed stacking will make you difficult to pin down.
If you want to go resolve, you're generally doing it to take Fleet Footwork, Second Wind, and Revitalize to help with a scary lane. However, Conditioning is also incredibly strong if you want those extra resistances for a slight increase in your durability.
While inspiration is popular, personally I don't ever take the tree. Approach velocity is nice but generally overkill as you would catch most people anwyays just with your Q's slow. If you want magical footwear for the free 300 gold value of tier 1 boots, gathering storm or conditioning is generally more gold value for you anyways, making inspiration just not a valuable enough tree in comparison. (Note, Senna support generally does want insp, mostly for the free boots, as in that role the 300 gold is worth a lot more because Senna support has less access to gold).
Adaptive Force, Adaptive Force, and Armor is generally the best into most lanes. Into enemy bot laners who are playing mages, like veigar or cassiopeia, you will obviously want to go Magic Resistance, but it may also be worth going Adaptive Force, Magic Resistance, Magic Resistance because that +16 MR will save you a lot of health in lane, especially if the enemy support does mainly magic damage. Against some lanes it is sometimes viable to go Adaptive Force, Armor, Magic Resistance, as the resistances will save you a lot of health in lane, which makes it more difficult for the opponent to force you out of lane or all-in you. Double Armor is almost never worth it since Senna (alongside most ADCs) has high armor growth with level, so the difference there is negligible after around level 4 or 5.
The 10% Bonus Attack Speed rune is terrible for much the same reasons I have recommended against Lethal Tempo and Legend Alacrity. 0.3 Attack Speed Ratio multiplied by 0.1 (10%) comes out to 0.03 attacks per second. That's roughly 1/33rd of an attack per second. Again, even inlcuding how it factors into the Q cast time, it's negligible at best.
As usual with most bot laners, you are generally expected to take heal, which is useful because of its self peel capabilities, as well as being able to save both you and/or your support.
I personally find Barrier to be stronger than heal with the new durability, but you're lacking the ability to save your support (and you're lacking the movespeed, which is sometimes worth more than the extra durability of barrier).
If you need to survive an assassin or a very fast champion (think zeri, jinx, etc.) exhaust is a lifesaver. It allows you to create distance to start kiting if they close the gap or just reduce their damage to save your life.
Cleanse is only really strong if the enemy team has a lot of cc that you will have a difficult time dodging. This is notably champions like Leona or Pantheon who have point and click CC. Cleanse is also strong if you're worried about exhaust and/or ignite, as it cleanses summoner spell debuffs.
Teleport is good if you're aiming to just not go down cs in lane, and if you know your team will need you for lategame teamfights. This summoner is also really good if you expect your support to roam a lot, as it makes you more self sufficient in lane.
- Common Summoners
You're always going to be building Kraken Slayer and Infinity Edge, these are your two core damage items and they are insanely important to Senna adc being playable at all.
Kraken Slayer is the best damage oriented mythic for Senna. Because the true damage calculation is a flat 50 + 40% bonus AD. As Senna, you have a significant amount more bonus AD than most other champions, due to your 50 base AD and then getting it from souls instead of leveling up. This means that you do a lot more damage with Kraken slayer than most other champions.
Infinity Edge also abuses a specific part of Senna's kit to be viable. While it is true her crits do reduced damage, as a part of her passive she deals an extra 20% AD damage on-hit with every attack (Note: this is one of the main reasons Guinsoo's Rageblade is even more gold efficient than it looks on Senna support). While that 20% AD is sadly not increased when you crit, that 20% is enough to make the damage of a crit more damage for senna than any other champion with normal crit scaling.
If you do the math, the damage per 1 AD is as follows Normal Attack: 1 damage per 1 AD. Senna Attack: 1.20 damage per 1 AD. Normal Crit: 1.75 damage per 1 AD. Senna Crit: 1.80125 damage per 1 AD. Normal Crit With IE: 2.1 damage per 1 AD. Senna Crit With IE: 2.1215 damage per 1 AD.
Because of these two items, raw AD is your most important stat. Additionally, due to the way souls work, you aren't locked into building items with crit chance on them, and thus Senna has more options for her build path.
In my opinion Senna's best build (In order, Long sword start) Muramana > Lucidity Boots > Kraken Slayer > Infinity Edge > Lord Dominik's Regards > Gargoyle Stoneplate
Sometimes finishing Lucidity before you finish Muramana is good, but be warned that Manamune/Muramana is a much stronger item when completed then the components are.
- Item Builds
Umbral Glaive: Recently I've decided this item doesn't feel super amazing. It's a good rush in lane if you plan on building Duskblade second and generally full lethality, but overall it scales into the mid game really poorly due to lethality being a much more valuable stat when you're up levels on your opponent, and as a bot laner, that is almost never the case.
Manamune: Weak until it's completed, but generally your best first item rush. DO NOT START TEAR, buy it on your first back. You should only really be buying Manamune in games against late scaling hypercarry adcs, as while this is quite possibly Senna's most gold efficient item in terms of damage per gold, it also is incredibly weak early and in most matchups you'll lose the game before you can scale up.
Note: In matches where you will want to go a specific item to counter the enemy team, for example Maw or LDR, you will want to go Kraken first and then build that item second instead of rushing one of the above items.
Gargoyle Stoneplate: After you've finished your IE, Stoneplate is the best option for Senna ADC for improving your uptime in teamfights.
Lord Dominik's Regards: Good against tanks and as a general last item damage spike.
Maw of Malmortius: Good second item into magic damage heavy teams. In my experience Maw has performed better than Wit's End due to the ability haste and the lifeline being stronger for Senna ADC than the attack speed and on-hit.
Blade of the Ruined King: Only useful into champions that stack health without armor, generally you don't need the movespeed steal to keep up with anyone but it can be useful for the few champions that would otherwise be able to outrun you.
Navori Quickblades: A strong late game item for when you already have a lot of crit and want your Q and W up more often.
Deaths Dance: Similar to Maw but for armor. It's generally rare that you build this, as most of the time you have enough base armor to be okay into all but the heaviest AD teams.
Youmuu's Ghostblade: Generally any time you would want this Umbral rush would've been better. The only notable exception is when you would want the active movement speed for teamfights.
Guinsoo's Rageblade & Rapid Firecannon: In my opinion, RFC isn't a particularly good item for Senna ADC. It is much stronger with Senna support, where your damage isn't as reliant on your items because a majority of it comes from souls. This is magnified by the idea that not only is Rageblade also much stronger on Senna support, but purchasing Rageblade makes your damage even more reliant on your souls for two reasons:
Every third auto doubles on-hits, meaning it turning crit chance from souls into an on-hit makes it more valuable the more souls you have (which is better for Senna support).
And your passive 20% bonus ad every attack is an on-hit, meaning this is also doubled every third auto.
It is an extremely gold efficient item for Senna Support and it's value there comes from the high soul generation and the item's gold efficiency for her. Senna ADC however, is much less concerned with gold efficiency and has far fewer souls, making the item a significantly worse purchase for her. RFC does have some games where you want that extra range and are willing to sacrifice damage for it, but most of the time the amount of damage you lose buildling an item that for her is almost entirely utility (due to her low attack speed ratio) will make you worthless as an ADC because you tickle the enemy team.
Generally you want to go lucidity boots, as the Ability Haste is extremely strong especially since you're not building a ton of it.
If you need to keep a distance, go swiftness boots, the extra movespeed is really good for that.
Into enemy teams with a lot of auto-attacks or crowd control, go plated steelcaps or mecury's treads respectively.
As a final note, this guide is actively being updated by me as I play more and more games of CSing Senna ADC. If you're planning to copy the item sets and rune pages here exactly, I would recommend checking back every once in a while to see if anything has changed.
Oh and remember: I am not all knowing, you may disagree with some of the things I've said in this guide. Feel free to leave comments voicing your disagreements, and hopefully we can reach a correct conclusion about what is best together.