I want a Prestige Class which fills the role of Occult Slayer or Witch Slayer, but one that works better as a PC class, so: (a) it's effective against general threats in addition to the specific Mage / Binder / Witch / Occult threats, and (b) has feature strong enough to justify inclusion in a party.

I also want to tie in feats like Mage Slayer from Complete Arcane.

Where else can I look to steal ideas for class features & mechanics which are congruent with those classes, and that feat?

Thanks!