Originally Posted by
Saintheart
Unfortunately, Heavy weapons (MoF p. 179) impose the Monkey Grip problem in reverse. You take -4 to your attack rolls with a Heavy weapon unless you have the right EWP feat, and you can only wield a Heavy weapon one size smaller than your own size category in two hands without taking the penalty. A Medium Warmace does 1d12 damage. A Heavy Medium Warmace does 2d8 damage. A Small Warmace does 1d10 damage, therefore a Small Heavy Warmace would do 2d6 damage. Therefore, you could wield a Small Heavy Warmace in two hands with no EWP and no attack penalty for 2d6 damage, i.e. literally no different than if you just wielded a Greatsword, or indeed a regular old Warmace in both hands as a martial weapon.
But yeah, if you're going to take EWP in a weapon anyway, you might as well make it a Heavy weapon for the extra damage dice since it's a EWP either way.