At the moment no, you can't get best results but that may (and probably will) change in the future... especially considering how Sierra like to have trade offs in her games.you should have chosen a captain man they help a lot ( and you get extra scenes as well ) with just 3 squads you won't get the best results in those raids
Besides, if you're going to play a dominating route, having Sabia going solo is pretty much the most logical way.