Phase 1 - build all of pin 1 and 2, for pin 3 build buff beam, shroom pit, and auras. (I Just used my dps to watch pin 3 and upgraded all buff beams for first wave.)
Phase 2 - Finish build and use any splits, I kept 1 guardian huntress pet at pins 1 and 2.
Boss phase - TB monk at pin 3, and DPS is optional.