I am playing in a warband games soon, and I am trying to decide between my Night Goblin warband and my Ruglud lead DoW warband. I would appreciate any advice on the following warband:

S/H Ruglug's Armored Orcs (x10) 190pts

R DoW Cannon 85pts

C Crossbowmen (x10) 80pts

C Heavy Cavalry (x5) w/barding 105pts

C Duelists (x 40pts

Total: 500pts

With the warbands rules, I can only have 1 war machine/chariot, and if I take a Reg of Reknown I can not take any other heroes. Should I drop the duelist (all or some) for any command models in the other core choices or upgrades for the duelists?