Not Updated For Current Season
Played this champ for about 4 games now and this is the build I came up with.
Haven't tested it yet though :P
Clarity - For early game lane control with your skills.
Cleanse - IMO this is probably better than the previous spell mentioned. You don't want to get debuffed, stunned, slowed, etc. while you're in invulnerability with you're ulti.
Ignite - Damage over time and gives +10 ap while it's on cooldown, if you've upgraded it in the masteries which I did for this build.
My items revolve around ASPD as you want to get as much hits in as you can while your third skill is activated.
Nashor's Tooth - Nice cooldown reduction & you might find yourself being able to go ranged everytime in late game as your third skill's cooldown is just about the same as its duration. If you got enough cooldown reduction, which for one game I had, I did. And again ASPD.
Guinsoo's Rageblade - This item is a must PERIOD
Archangel's Staff - One of the best AP items in game. Get 4 of this, zhonya's ring and an AP boots on a nuker = more or less 1k AP. Not saying you should get 4 for Kayle though, 1 is enough.
-to be continued?-