you should lane in solo mid on 5vs5 or solo top in 3vs3 and always stay behind your team and with your ultimate you can attack behind walls on dominion go solo bot stay closer to the hp pack than your oppponet to give you an edge over them

corki is very good at farming with his missile barrage and gatling gun after getting a sheen

in classic take one of the following summoner spells:
heal:useful for all carries and supports becuase they get focused down
teleport:perfect for carries soloing any lane
flash:helps you catch up to the enemy or escape
surge:(1 of the new spells avaiable) gives extra attack speed and ablity power which is what you need to be a succeful corki
exhaust:smae reason as flash but better reduces their damage output and item damage
in dominion take one of the following:(reason why check clasic)
heal
ignite
flash
ghost: helps you chase enemies and or escape and get to enemy capture points fast or your team point undere attack

pros:
can deal burst damage
farms extremly well
good harraser late game
cons:
gets focused in team fights
weaker early game than other champions