Originally Posted by Kayle
Righteous Fury - Ignites Kayle's sword with a holy flame, granting Kayle a ranged splash attack and bonus magic damage.
Kayle harnesses her righteous fury to increase her attack range by 400 for 10 seconds. These attacks splash, dealing an additional magic damage to her target and nearby units take 20/25/30/35.5/40% of her attack damage plus magic damage.
The total bonus damage is 4/10/16/22/28 base damage plus (+0.3) (30% of her ability power).
The base damage of your auto attacks are physical, thus life steal. The other part is all magical damage, thus spell vamp.
Rylai's AoE effect procs on the splash (mallet on the physical)
Crit only on your target but not in the splash
Sheen modifies your base dmg and deals it as bonus dmg, so it does not effect the splash whatsoever.