I first would say that you have ALOT of points in your heros. and that makes me a bit wary being how much our heros eat in combat. but if you are doing it for LD thats fine, i would just tune out some of the magic points. The musician in the handgunners is un needed when they get eaten alive in CC.
also the great weapon knights are a waste, ST4 all the time while striking last is not nearly as good as st5 on the charge and striking in I order. also you upgraded one out rider to a champ but didnt give him a special wep. waste of points IMO. and i also HATE the new rules for the hellblaster, and would dump it for the helstorm, its a huge template, and as wildly innacurate as it is, if it hits, thats a huge template of death. while the helblaster will throw out a max of 30 shots on a BS of 3. and then roll to wound, it seems as unreliable as double scatter of the helstorm. i woul double up with a mage in each unit but you then loose combat potential and are subject to being beat upon in CC.
i would run the pistols / outriders with the stank with a unit of nilla knights for protection and just demolish a flank...