Starting Wave you can build all Buff Beams, Auras, Shroom Pits, Golem, and the (2) Mortars at Hint 1.
Starting wave the following characters should be out - TB Monk, Adept Upgrader, Squire Builder.
TB Monk on Hint 2 and mana drop to the squire builder to finish the mortars at Hint 2 and Hint 3. Once mortars have been built you can take squire builder out. Hint 3 (1) mortar is facing East and West and the rest of them to the South.
Adept upgrader should start at Hint 1 and you can go to either crystal after that.
TB Monk at Hint 2 until boss wave then move TB to Hint 3 to assist with DPS App while Tower boosting/Hero Boosting for the boss kill.
The other (2) splits you bring in should have a huntress guardian on them and placed on the other stacks during boss wave (This might not be needed but helps)
(This build is much faster in Duos with (2) splits per person)