at first you want to lay wast to there minous. if they are by them even better. level 3 is when you should get a bit close so you can hit them with your Defile to do damage to all of there minous/enemies. once level 6 they should be low enought to ult for a kill.

you should have lot of ap 300+ which is a good thing in team fights so do lots of damage to them when they have low resist. and finish them all of with ult to get a good double kill or higher.

if played correctly you should have 1000+ ap that will kill them all with Defile then Requiem to finish them all off

lot of ap can cast ult while dead or any spells. cons can be easly killed.