I tried that before. If your troops are so inferior that you need whole reinforcement squads, you aren't going to get far. You'll be too stuck doing management that you would not have the time to enjoy the game.If you click the red banner icon in the bottom corner, you can set up squads to be deployed. Since you can set up at least 6, you can absolutely set up giant hordes of goblins to be deployed at a moments notice and just overwhelm enemies with seer numbers and some good timing. Not necessarily efficient, but possible.