The complete hammer gives you great bonus to streaght, meaning a bonus to Thaco. It also has the power to kill three of four tought monster types with one hit and if your worried about domation a helm or pendent that blocks mind control will stop it from happen, but if you feel that they are best spread between the other, it really up to you. But my I suggest that you make a new save try it and see which choice you like better.
------------------
The angel's MIA.