Kai'sa is the ultimate hybrid

Any other champion has so many different viable builds? Most play her in a typical ad build that focuses on attack speed and damage, but have you tried:

1. Kai'sa sniper - pure ap, luden first item, max CDr, max ap, Aery mastery. Full build will give you a 4 sec cd, 1300 dmg, 2500 range void seeker. Best works as a blue item support. Requires good skill shooting and map awareness
2. Kai'sa biotank. Maximum regeneration - death dance, gunblade, spirit visage, ravenous hunter, revitalize. 1 icathian rain will heal you to full hp from 1%, if you stand in a minion wave.
3. ap aa build. GUinso, Nashor etc. basically a midlane ap like a Kayle.