6 points, for Vitality or Replenishment?

30 Vit
14 Att
35 End
39 Str
10 Faith

Smough's Hammer, Sanctus, Power Within, GLGS Dance, Toxic Mist.

Should I invest 6 points for vitality or replenisment?

Replenishment. That plus the sanctus should counteract power within. Especially with a good talisman.

Can't cast replenishment while Power Within is on. Also this should be on the PvP section. :S

Thats true, I'd go vit then. Every point counts especially with a weapon like the hammer.

Are you always going to be using PW on that build. I.e is it key to your fighting style?

No, I will only use Power Within when fighting against randoms. Also I mostly use Power Within for fun.

Then I figure better to be prepared than not so. You dont need to have extra vit if you have about 30+ anyway. The Hammer more than makes up for that..