Originally Posted by Yitzi
Interesting...I would suggest, though, that the voidblade eliminator gain some means of (1) bypassing spell-based miss chances, and (2) preventing their target from escaping them via flying or the like.
The first one is easily done with the Mage Slayer and Pierce Magical Concealment feat lines; a lot of martial characters take these feats anyway, and I don't feel the need to replicate them.
As far as flying enemies, I don't really have an easy answer for you. It'd be hard to expand their mechanics into flying or teleportation prevention without starting to lose focus on the class's theme.