Maybe s/he's got plans for 175 wound games? To the
OP, have you
played a game this large? How'd it go? Your list has plenty of heroes, guns and multi-wound models so it shouldn't take as long as actually having 175 infantry dudes, but that still seems like quite the time investment!
As for the actual list of warscrolls, heavy special characters + hero spam + guns + loads of synergized dudes (you are taking advantage of all that Empire interaction, right?) sounds about right
- Salvage