If I were making an antipaladin, I would probably use a lot of fear effects, since they remove fear immunity nearby. Cruelties can be pretty nasty, particularly with a Conductive weapon (from APG, allows user to spend two uses of a power to cast it on a weapon hit).
If fighting casters, the Blighted Critical chain might be fun. I like the idea of a fear-focused antipaladin who inflicts Nameless Dread with each crit.
Dreadful Carnage would be fun to stack up fear effects, and Furious Focus is always good for a 2-handed warrior.
