I found out that the Martel-de-Fer (the alternative great maul) does 61-101 or something like that.
However I found a decent long sword in hell (6-42), very fast, and +170 or something to AR, plus something :)
So I went for sword mastery and a shield. The point is, the higher-level swords should deal a lot of damage and partially overlap the damage advantage of the great mauls.
Plus, shields, as we know, are superb. Having a 70% chance of blocking every strike, getting lots of def (maybe even hundreds) and resistances from perfect diamonds to boot is just too good an offer to pass imho.
This way I can even fight using the regular attack, because of the sword´s speed and the shield´s defence (Of course only when it´s not necessary to use a skill.)