Kayle is in my opinion great dps champion. It's actually my main champ. When played right she deals great dmg. I play her as a hybrid, beacaouse I think it works best with Rage Fury. Sure, with pure ap build you have better Divine Blessing and Reckoning, with weaker Rage fury, but I belive it cant be compared with Rage Fury output of a hybrid.

On Kayle it is important to have Clanse, so you cant be stopped in fight so easily. But the main thing of the cleanse is that you can cast your ultimate if stunned.

For the 2nd spell I prefer to take Clarity, beacouse my build doesn't includde mana items.

I would recommended you to set offence masteries as shown on mastery tree. Remaining 10 points can be set as u wish. I like to spend 3 points on utility for mana regen, and other 7 for defence.

My current runes for Kayle are as shown. I think it is good to have some defence on DPS champions. Nevertheless attack speed, and penetration is important.

Item build is a stated. Just make notice that you buy attack speed items first. After boots I ussual rush Black Cleaver, next Malady and Rageblade. Then dmg items. I ussualy make 2 Hextech Gunblades. Some laugh at me, but I think you cant get better dmg with lifesteal and spellvamp.

But it basicly depends what your opponents are building. I would of maybe replace 1 Gunblade with Madred's Bloodrazer.

With build as seen in "Purchase Items" you build somewhere above 350 AP and 350 AD, with a lot of attack spped and decent penetration.

I always start with unlocking first 3 skills. Unlock Rage Fury (E) first and second Reckoning (Q). Then continue to unlock Rage Fury and Reckoning simontaniously.
If your lane is annyoing you can boost Divine Blessing (W) few levels up, otherwise leave it to lvl 1.

MAKE SURE you hit your opponent with Q skill first, and then start banging him with E. Q skill rieses your damage dealt by some percent.

Have some guts if you have your utlimate. Do a combo mentioned before, heal yourself in between and use your utimate mid fight. When your Rage Blade stacks up you can heal yourself for pretty great amount of HP. I do that a lot. Cleanse is here very important, so you can cast utlimate any time.