Dwarf heroes are some of the most expensive, albeit some of the best, going. Try swapping out 1 or 2 of the named heroes and for standard captains, shieldbearers (I think that's there names) or anything else to your fancy. This will give you a lot of free points to spend on more guys to bump that break limit up as
atm it stands at 15 - this is much to small for 750 points.
Dwarfs struggle at getting a lot of guys on the table and taking multiple named heroes wont help this.
With the extra points I would take some more Kazard Dum guard as there body guard rule is pretty sweet. Otherwise just more standard warriors while keeping that bow limit to the max!
P.s sorry if that sounds harsh