As Tulkas said, Dwarves frequently strike last anyway with their Initiative of 2. There were times I wish I'd had great weapons in there for the bonus strength (I was using a pirate themed warband with pistols and swords). Having everybody working with a buddy or 2 is good. Couple of multiple weapon guys, and a great weapon guy for killing rival dwarves, or monstery things.
If you get a henchman promoted, give him access to Strength and Special lists and get him Strongman, Resilient and a few of the good Dwarf skills and have him wail on stuff with his great weapon. The survival skills will keep him functional while strongman will occasionally let him strike first (when he charges). Alternatively, give him a pair of pistols to fire when he charges and then switch to the great weapon afterwards when he'd probably strike last anyway. Then you can focus on just taking survival skills.