Stand on Hint 1 stack with Heros: TB Monk, 2 Guardian Summoners (Monk and Huntress x2), and Builder Warden
Aim TB Monk towards corner indicated by black arrow.
Start wave 22, build - pull out Upgradder and TB Monk. Wave 23 have all 4 toons active.
Hint 4 (optional): 6 Archers for the company.
TB shouldn't go down, just keep an eye on it until you dial in the position to aim him. If you keep Warden on P1 you can wraith around 2100 enemies when it gets heavy.