Prom 2h is a better bind than Primal Baxe and Spear. You can't use berserker ring with Primal Spear, so the Spear is really only a good bind for people who don't use berserker ring (i.e. people who mage a lot or range a lot).
Prom 2h has better DPS than Primal Baxe for most monsters with decent defense (i.e. most of the monsters in dungeoneering).
STOP changing it back.