I don't think you can do a silent death with hth weapons - you are seen at 3 hex and melee weapons have 1-2 range.
Anyway bruiser gives x2 dmg, +4 Str and -2 ap. Heavy Handed is theone that has a -30 on critical hit rolls and silent death only gives +10. With helmets, - crit armors, boneheaded and men of steel the +10 is worth zip, nix, nada, ni-papaja, zero.