Problem optimizing my ghom gph with my barb

[koibita]

i can't seems to get more then 48 gph.

i pretty much have all gear i want.
2 piece cain + 2 piece aughild + Rorg + Soj +cindercoat + Andariels + whitching hour + haunt of vaxo
i have 3fecta magefist and tasker

for spells i use Wotb, Call of the ancient, Avalanche, overpower, frenzy and battle rage

for passive, Superstition (Can't live without it), Weapon master, Ruthless and Berserker rage

i'm not shure is there is a better build without dropping the superstition.
i have 110% fire damage with tasker and 125% with magefist

i'm at 1627k dps and 3747k toughness unbuffed,
4762k dps buffed and 4683k toughness buffed.

anybody around these number could guide me a little?

thanks in advance