Against kayle, Try to end the game as quickly as you can as the longer the game goes, the stronger Kayle becomes.

Kayle will tend to be split pushing during the mid-game. You can use this time to force a team fight with the numbers advantage while she is pushing in a side lane. 

Kayle is rather vulnerable when her Ultimate R is on cooldown. Try to force fights and kill her while her Ultimate R is down. Against kayle, Try to finish the game as fast as you can as long as the game goes, the stronger Kayle becomes. Kayle will tend to be split pushing during the middle of the game. You can use this time to force a team to fight with the advantage of numbers as she pushes into a side track. Kayle is rather vulnerable when her Ultimate R is on cooldown. Try to force the fights and kill her while her Ultimate R is on the ground.