Good day, Summoner!
I am Brassherald, and this is my guide to Corki. This is also my first guide, so some tweaking will be done as I iron out any issues, change formatting to look prettier, etc.
But, enough about the awesomeness that is me, and onto the awesomeness that is Corki. Let me answer a few questions before starting:
1. Is this guide for AD or AP?
AD, plain and simple. While AP may be viable and even fun, AD is just a better build for me. It uses his passive, it powers his ulti, and it makes your armor shredder into a strong armor shredder of doom. What's not to like?
2. Will you give advice for AP Corki players anyway?
Yes, don't read this guide.
Now, onto the guide itself.
Guide Created, items shifted a bit. Credit goes to Codfish for talking some sense into me.
Why not Trinity Force? section added.
Why Wait on Manamune? section added
| Hextech Shrapnel Shells
| (Innate): Corki's basic attacks deal 10% additional true damage to minions, monsters, and champions.
You read that? Okay, now reread it. This is my favorite passive for any ranged carry in the game. you are dealing 110% of your AD per hit before armor is taken into account. Not to mention the 10% rounds up giving you extra TRUE damage!
| Phosphorus Bomb
| (Active): Deals magic damage to enemies in a target area. In addition, the blast reduces an enemy's chance to hit by 35% and reveals nearby stealthed units for 3 seconds.
Pretty good spell, first we get, in fact, and third priority. Useful to check the brushes, farm AOE, hard counter Akali's smoke, Kill Wards, and protect against invisible characters.
| (Active): Corki surges to target location, dropping bombs that create a trail of fiery destruction for 5 seconds. Opponents take damage each second they stay in the trail.
Good escape/gap closer. Get it level 2 and leave it, though, we have bigger fish to fry and 8 seconds off the Cooldown will not save your life.
| Gatling Gun
| (Active): Corki's gatling gun fires multiple shots every half second for a short period of time, dealing a quarter of his attack damage and shredding the armor of enemies who are under continuous fire. Armor reduction stacks and lasts 2 seconds.
Great move, destroys anyone who decides to stand in front of you and keeps the enemies armor down if they are hit continuously with even autoattacks. This is why I don't recommend Armor Penetration Runes.
| Missile Barrage
| (Active): Corki fires a missile towards his target location that will collide with the first enemy it hits, also dealing damage to units around the target.
Corki stores one missile every 10 seconds up to 7 missiles total, the time to respawn a missile is affected by cooldown reduction and does not progress while having maximum missiles. Every 4th missile will be a Big One, dealing 60% more damage with 100% splash damage. After dying, Corki will respawn with 4 missiles.
Long range harass, good scaling off of AD... Not too bad for an ulti. Save big ones for when you are sure to hit.
Masteries + Runes
Masteries are easy enough
Standard AD masteries, improved Exhaust and improved ghost for summoner spells. I'll explain those later.
Runes: Although the standards are acceptable my personal favorites are as follows.
9x Greater Mark of Strength
Yes, I do not go Armor Penetration. With the recent nerfs to ArPen runes, and the fact that Corki not only deals True Damage, but destroys armor, I hold that this boost to your early game is great. You should be good with these, but ArPen and Attack Speed are also viable
9x Greater Seal of Clarity
I personally think these are great, you'll be using mana alot, and these will help. Even if you get tears, I like to use these as well. But Health per level are okay too.
9x Greater Glyph of Shielding
Yes, not CDR. I prefer the MR for later in the game, when the nukers can bring you down in seconds, this lets you delay building survivability in most cases. (does not do away with survivability needs)
3x Greater Quintessence of Vitality
These are my favorite Quints, I use them almost all the time.
I recommend Exhaust and Ghost. Both can be used defensively and offensively and are good if you're a slow carry, like Corki.
I prefer not to use Flash because it may be removed soon.
This is ugly, but I can't figure out the nice table
Missile Barrage> Gatling Gun> Phosphorus Bomb> Valkyrie
Start with a Doran's Blade and a Health Potion
This will be fine for either side laning or mid.
Try to get 1345 gold before coming back to grab Tear of the Goddess and Boots of Speed When this is done return to lane, and be ready for the long run. If you NEED to come back upgrade your boots to Mercury's Treads Or get Greaves if the other team has no hard CC or is totally incompetent.
Try to get 1850g before returning and get your B. F. Sword Then Return to lane and farm enough to finish your The Bloodthirster. This was not in my core build originally, but I do believe that the build up feature and lifesteal makes this a good item to get early.
It is at this point that you can do one of a few things according to the situation.
Are you Dying? If so, build Banshee's Veil for MR, or Frozen Heart for physical DPS. Remember a dead carry is less useful than a lower damage living carry.
Are you in dire need of a slow? Build Phage, but most of the time this can be remedied by grabbing lizard.
Are you in need of a quick attack boost? Build Manamune Before it would not have done much, but now, you have a good amount of mana for an instant boost in AD, this is better to finish late game on a character like Corki.
Raising money like crazy? Start your Infinity Edge and cheer.
After you get an Infinity Edge and Manamune, you should have it in the bag, but if the game somehow goes longer, these are some good items.
Last Whisper Pretty good for AS, and a definite choice against armor stacks.
The Black Cleaver This was a core item before, but credit to Codfish for making quite a convincing argument for a Bloodthirster earlier than I had it. I believe he is right, and I had forgotten about Bloodthirster's farming feature.
The Bloodthirster It stacks... Why not?
[item=Stark's Fervor] Only if no one else on your team bought it.
Why not Trinity Force?
I do not like it because of its low AD values, sure the active is kind of nice, but the IE for just 10 more gold boosts your crit chance, boosts the crit power, and gives 50 more AD than Trinity Force. To give you an idea, too, Trinity Force, only supplies a boost, by itself, of 15 to the next autoattack, thats 50 damage with Corki's passive on the attack after a spell cast, with IE, its a whopping 88 damage. Thats 38 damage, 3 of which is true damage. IE is, all around, a better item.
So, do yourself a favor and splurge that extra 10g for the better item, THROW CAUTION TO THE WIND!
Why Wait on Manamune?
Manamune is simply not that good until you at least get your first BF sword. It costs 1115 to upgrade Tear to Manamune. At this point, you are 735g away from a BF sword, why wouldn't you finish that first for much more AD?
Further, after you get the first BF sword, finishing the Blood Thirster is still a superior strategy, its only 1350g, which is 135g more than finishing Manamune, and will give you more.
After you have BloodThirster, you can either go with your BF Sword for your Infinity Edge, or finish manamune, at this point, it will still give you less AD, but will also make you farm extremely quickly, and make any defensive items you get boost your AD with their added mana, YAY, DOUBLE TASKING!
In the end, Tear of the Goddess is a great early game item, but, as a friend pointed out to me, Manamune is better left until late unless you are building mana solely by Autoattacks.
Pros / Cons
+You are a flying death machine
-Did I say slow? I'll repeat it.
With that you should be good, any issues, comments or suggestions are welcome.
Now go out to the fields of justice and beat down the masses of noobs.