Nasher's Tooth

This was just a guide that I made for my friend so if you see this it might be helpful and it most likely won't.

The runes are pretty basic. They give you both magic pen and AP per level to make you better late game.

It gives you CDR needed for your Q and E that allow you forever combos while giving you starting spell vamp and extra movement speed for a slow Kayle.

I would recommend flash and exhaust. Flash just give you the escape and closing ability that Kayle lacks while exhaust allows you to drop a fed AD carry in his/her tracks or kill that escaping enemy.

This build really relies on the fact that you can cast your Q ever 3.5 secs which means your target is always slowed and allows you to pull out your E to range them and deal extra damage consistantly. Your W can be used for little heals and to close the distance on an enemy or escape a battle. Your ult should be used early in chases to make sure that you don't take too much damage quickly and force all the big starting hits to become useless.

All in all Kayle is a solid hybrid that can carry a team if used right while being able to support another carry. Come on who doesn't love an invincible carry :)