H1: 4 du buff beam and 4 reflect beams in a square on the inner part of the conveyor. so the conveyor has the edges that are gray you want to build the refelcts on the black part of the conveyor in a square around your defences. Your TB and all summoners including upgrader will chill here
first wave upper and tb upgrade the conveyer buff beam to max then make sure to upgrade the defences behind because they always break unless you dont. have tb running on both in the reflects the entire time. after you star everything make sure to star everything on the outer defences too in the same wave. then switch to summoner with knight and huntress or literally do whatever because you're set.