Bossing team to the left, clearing team to the right
Move your teams on top of the teleporter but don't use it
Use your clearing team to activate the path on (3) then use the teleporter with your bossing team, swap places and attack the tank above.
Activate the other path at (2) with your clearing team then move to the now opened path with your bossing team
Attack the enemies with both of your teams on this turn. The boss will attack you for a 4-turn clear.