Thunder hammer vs powerfists?

[niiai]

So I play SW among Nids and GSC. And I can not deside upon what is best in each situation.

The general gist is fists hit on 2+ vs hammer 3+. But hammers have devestating wounds.

The models it often matters most in is on characters or temrinator units. With the change to oath of moment fishing for devestating wounds is harder.

[piersonsmuppet]

Hammers. -1 to-hit is worth occasionally skipping saves, especially if you send the unit into Oathed targets (the -1 hurts less).