Kayle is very good champion for pushing turrets and takedown champions. She deal very much magic damage and she can pull the game like AP carry.

Kayle's masteries are offensive and defensive beacouse she isn's difficult to mana use. Her spells have cooldown. And she can deal much damage with out ability power.

In late game use Righteous Fury for activate Lich Bane and then use Reckoning so she takes half healt. Pick righteous fury first to get early farm on lane but as the first max reckoning to deal much damage and early ganks to others lane.

Combo to get early kills :


Combo to teamfights :
...

In teamfights stay behind your team and try stay in range to use Righteous Fury. Try to get early gank to other lanes.

+ She deal much damage
+ Very useful ultimate to diving

- She have weak heal in early game

Don't be afraid to use Righteous Fury to farm minions and pushing towers easily beacause don't need much mana and with Doran's Ring which restore your 4 mana per minion kill.