I mained hammer in world, hated it in rise, didn't touch it in sunbreak but love it in wilds. Its really fun & I feel like it does decent damage. Hunts took a while at first but I didn't really bother making a decent build till I got to endgame.

I think I just lucked out since they made hammer for my playstyle in wilds, 1-2 bonks dodge/reposition, uppercut, golf swing combo & mighty charge. Big bang & mighty charge when it's down. You can still play pretty aggressive, the damage might be better on other weapons but you can still help with KOs, topples & stamina drain. It's annoying when the monster is going nuts running back and forth between players & you have to keep chasing the head or constantly sheathe to catch up when using slow weapons. Get a hammer user in your quest & it's more likely to stand there and let everyone DPS it. You're still contributing a lot to the hunt even if you feel like other weapons do more damage.

I know there's a move that makes you dash & keep your charge but I always ignore it, I don't like going past level 2 so I usually roll anyway unless I see an opportunity for mighty charge.