It looks like some of the blood rage powers in the advanced class guide could create a few really interesting synergies (especially since you can still take totem powers on top of them). What pops out for me is "Undead Blood, Lesser". An unsavable shaken application on successful charge seems really powerful if you have a "Shatter Defenses" Sneak Attacker in the party. Heck, could be worth a dip into Barbarian for such a character to get it.
Any thoughts beyond the necromancy I'm performing by posting this?