As humans, can we take feats that are only available to other races? Since this is a Wrathful Creature template. I think some Orc/Half-Orc feats might be interesting to me.
I am torn between a Barbarian/Shifter or something like the Gunslinger - Siege Gunner | Brawler - Constructed Pugilist
Is Brawler ok for the gestalt?