This stage offers a mirror match, which means offensive team is quite the same as defensive team.
But their purposes are different and unbalanced.
Offensive team should have a victory on the battle.
But defensive team is just required to kill opponent at least one.
(Edit) What I want to do is building a team to kill offensive unit as easy as possible and prevent offensive team to win.
I tried building a few teams but didn't feel them harder to be defeated at all, except a team with absolutely no Galeforce units.
With all units in Lethality or Range 1 Counter, and no Galeforce, if I doubled some to destroy opponent units with no risk, my pairs would force to engage the rest enemies' Lethality and/or Range 1 Counter at enemy phase. This sounds a good idea.
Any other ideas?