Wave 1 Build: Auras, Buff beams, shroom pits, swap to guardian, build guardian stuff in combat of wave 1. Swap to summoner, move to position, TB and upgrade as desired and roll through. Hmmm, to save on time, I'll try just shroom pits next time, should still be effective, but keeps from having to swap to a new character.
Party: 1 TB monk (also your upper), 3 summoners with monk/huntress pets
Hint 4: TB stands here to catch the full build (once upgrades are done)