Round 1: Auras, Beams, Traps, DST if have time
Combat: upgrade beams as fast as possible
Round 2: LT, DST (if not placed in round 1), archers, some mages
Round 3: rest of mages
Hint 3: 7 Lightning Towers stacked
Stats (rounded for readability)
EV Beams: 3300/4600/1200/2100
If your auras are weaker, add a gas northwest crystal and remove a lightning tower.
If your auras are about the same as mine, make sure to up the beam and aura, beam to max, auras to 1 star
Testing if fully afkable with boost monk with mega chicken and double guardian boost.
Used constant tower boost during entire boss fight, fully afkable is up to your own testing.
Have enough left over MU to add 4 more mages total, so 7 per at hint 2 max. Use as few as possible based on your stats
Using only guardian boost (app and hunter guardians) and monk t-boost, easily takes care of all bosses without hero dps.