Basically this corki can take the enemys life really fast and alot of it.
also when it comes to his abilities he does pretty well with those too.

This works pretty well because hes ranged and has lifesteal and attack speed

All i know is the first two games i played him with this build. i went above and beyond what i expected.

BTW constructive criticism is always appreciated

PROS
-good at taking alot of life really fast
-basically a lifestealing air strike later in game
-decent enough in early game and gets better
-is able to spam his abilities
-good in team fights
-basically a teemo on wings with guns

cons
-susceptible to ganks
-not the best amount of health on him
-not a whole lot of mana

I wish there was lifesteal runes but i guess that might be a little unfair but the ones i have up there do the trick and help on his not as strong suites.

Basically i set up his masteries to be a killer mage that takes alot of health

-vampiric sceptre helps out early game for taking the little life that the enemy sometimes has
-sheen is great for laning longer with your abilities
-berserkers greaves help with taking the life reallly fast
- trinity force helps his skils out overall just enough so he doesent die and all that good stuff
-hextech gunblade is probably going to be your best item with its stats
-starks fervor helps out with more lifesteal and AS to your teammates as well
-if the game isnt over by then just get a malady for AS and AP
-wriggles lantern just for the hell of it lol

-your two main spells are going to be gatling gun(for taking out crowds) and phosphorus bomb(for spotting and damaging the crowds before you own them with your other spells)

-missile barrage helps ALOT when you stack the rockets...does alot of damage :D

-Valkyrie helps in some team fights and helping you or your teamates get away in a tough sitiuation

I use heal for the extra health boost if i ever need it(such as in 3v1 ganks on me)

exhaust helps too when the enemy champs get close