Some others have already alluded to this but it's going to be very difficult to deal much damage with that list. I've found that a winning strategy for rebels is to pile on the firepower in order to take down a couple of flimsy Empire ships early. With only two attack dice vs the typical three defense dice (for all Empire ships except Firespray), these Smugglers probably won't even take TIEs down very quickly (Gunner or no Gunner), and as a result you'll probably fail to deprive your opponent of his own firepower. I think a simple swarm of 7 or 8 TIE Fighters could present these Smugglers with too many targets to take down efficiently, and given the YT's large base it won't be difficult to get the TIEs within range 1, rolling 3 attack dice vs your 1 defense. Perhaps you could try to maneuver out of their firing arcs, but with 8 of them I imagine it would be pretty difficult to make all of them miss. I just don't see this list being effective.