Ice Ice tank
and an ice ice controller or defender
the ice tank grabs a bunch of mobs brings them together hits EA and boosts their defense thrugh the ceiling theyre also protected by the ice armors boost to resist
with the mobs stuck next to the tank by chilling aura and ice slick the controller locks them down and dumps snow strom and freezing rain on them
mobs functionally can do NOTHING withoyut it taking an age and a day to recharge icicles and damage from the immobs just clear everything out over time
the tank is essentially unstoppable and the ice controller is almost never touched