<Snipped quote by Disdain>
If stealth is the goal, keep those groups smaller. If the goal is to crush the opponent with force, send the defense out first, then the heaviest hitters, then support.
Once they figure out that we're attacking, they'll all be on their guard. With three teams, we can attack three points at once without losing the element of surprise. If we try full force on one point at a time, they may gather at the points we are heading toward, and will have the advantage of teleportation while we have to get there on our own. Can we bring the full bore of twelve fighters down on our opponents effectively?