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Welcome to a guide about my new favorite champion: Corki The Daring Bombardier. I have found great success with this build because it offers superb farming capabilities paired with insane damage as well as a lot of ways to keep the enemies from killing you. If played right it is hard to get a negative score with Corki, I really can't imagine why the poor guy has only 11 build on this site.
The way you play this build in a nutshell:
Farm a lot until you get Trinity Force, then start owning every teamfight with your insane damage.
So lets talk about the build.
For my runes I just choose the runes suggested by Searz in his rune guide. If you have questions about which runes to use with any champion, I would highly recommend checking it out.
Marks: Armor pen, Best runes to increase damage and that't carries are all about.
Seals: Mana regen/lvl, These help me out so much with harassing and farming.
Glyphs: Cooldown reduction, You arent getting any items with this early so it's nice to have 10% from runes and masteries.
Quints: More armor pen, and even more of that sweet dmg.
I go with the standard 21/0/9 ranged carry build. 21 in offense for damage and 9 in utility mainly for the exp. The 5% is actually very good.
Max out phospherous bomb first, picking a level in Valkyrie at level 4 for the escape/chase capability. 2nd skill to max is gatling gun and ultimate when available.
Doran's Blade and a Health pot. Cookie cutter starting items that do the job very well.
Boots of speed. Pick up boots first time back unless you have money to buy Tear of the Goddess
Tear of the Goddess. Great item for Corki if you turn it into Manamune. If you get it early you can stack it up. It will also enable you to spam your spells to farm and harass.
Boots lvl 2. It's time to make your choice about which boots you will need most. If the enemy team has some nasty CC Mercury Treads are a must. If not, Berserker's Greaves are the best alternative.
Some champions that have nasty CC and will always need to be countered with Mercury Treads:
Veigar: Cage, at high levels this is a very long range stun with a long duration, terrible for a Corki.
Amumu: 2 stuns, bad for Corki.
Ashe: Arrow and slow, you never know when that Ashe arrow from across the map will hit you, she also slows with each attack and mercury treads make your escape that much easier.
Fiddlesticks: Fear level 5 lasts for centuries, without Mercury Treads a good Fiddle will be your downfall.
Rammus: Don't even get me started on his taunt...
Even against teams without these CC *****s Mercury treads can be the better option. If they have multiple stuns/snared or very high magic damage you might want to pick them up.
Manamune. Finally some more damage, By the time you get it it will give you about 50 damage, along with the mana and mp/5. Not bad, but! by endgame it gives 1350 mana so you will never have mana issues even when spamming. At level 18 when fully stacked you will get no less than 82 attack damage from this low cost item.(only 250 more than a BF sword)
Sheen. The first part of the almighty Triforce. Get this first to give the enemy a taste of what's to come.
Phage. The second part, health and slow? yessir.
Zeal. YOU'RE ALMOST THERE!
Trinity Force. Finally, you can go win the game for your team. Trinity Force has so many stats that are good for you, its crazy. The most important part however, is that you will do insane damage with the 150% bonus damage on almost every attack. You can constantly use abilities during a fight with your mana pool and the 1.2 second cooldown on Missile Barrage makes sure that Trinity Force's use is maximized.
Vampiric Scepter. I like to get lifesteal right after Triforce so I usually just pick up a vampiric scepter and upgrade it later. It helps to restore health on minions and jungle monsters and gives you a little bit of survivability in a fight.
The Black Cleaver. Great item, it was reworked and has become awesome for corki. base armor at lvl 18 is around 70 so that means that with 25 armor penetration from the runes and the 45 from black cleaver all champions without armor items will take close to full damage from your attacks and the Trinity Force bonus damage. The armor reduction also works for your team which is a huge bonus if you have more physical champions on your team. The 30% attack speed is welcome, especially if you bought Mercury Treads.
This is where the core build ends, by now the game will be in the teamfighting stage and you should be destroying their team.
It depends on the game what you should buy next.
if you use flash/ghost/valkyrie and still can't stay out of the enemies focus you will want to pick up a defensive item in order to stay alive during fights.
Banshee's Veil. Always a strong item against casters/CC and you get health and mana.
Frozen Heart. getting hammered by that tryndamere? Frozen heart will save you some trouble. The 500 mana gives you 10 damage from manamune. 25% cooldown reduction, very nice!
Guardian's Angel. I like to get this in very long games as one of my last items.
If you have no trouble staying alive, go ahead and increase that already OP damage you do.
Bloodthirster. Annoyed by that Vampiric Scepter in your inventory? Time to upgrade it!
Last Whisper. If they have multiple people stacking armor this will further reduce their armor, only needed against extreme tanks because you already have so much armor penetration.
Some people might wonder why I didn't put Infinity Edge in my build, but this is not a crit build. I focus on maximizing the damage from Trinity Force procs instead of critical strikes for a few reasons.
Trinity Force procs are not random. You can control when you want to do 250% crits, this means that you have superb poking power. Shoot 1 rocket at them and attack once, repeat this and you will tear their hp bar to shreds before the fight is initiated(only when you are sure that you are safe to be in auto attack range).
A build with Trinity force offers more farming power early game and more survivability and utility in 1 item that an Infinity Edge build does not provide.
You will actually get more 250% dmg hits as Corki with Trinity Force than you would get 250% crits with Infinity Edge. The reason for this is that you will be constantly moving to get in position during a fight, you will not attack at maximum speed for a long time, giving you bonus damage on a very high percentage of your attacks.
Trinity Force does have an internal cooldown system and it works like this: Each of your abilities has a separate 3 second cooldown. So you cast Q, then 1 second later, you cast W. At that instant, Q will have another 2 seconds before you gain the "on cast" effect, while W has 3 more seconds. that means if you use your abilities succesively you can do 4 250% crits in less than 4 seconds, enough damage to kill any squishy and that's not counting the actual damage from your spells.
The order would be R>attack>Q>attack>E>attack>R>attack.
When you get targeted by more than 1 champ you will have to run away using ghost/flash/valkyrie until they stop focusing you, at which point you can turn around and kill them. I can't stress how important this is, it's the key to team fighting with corki and really any ranged carry.