Hint (1) The Sludge Launchers should be angled to shoot down the South and North walls respectively to handle the occasional Ogre and Genie.

Hint (1 & 2) The Cloud and Seed Bomb point straight forward to handle the Dijinn and Ogres that come down the center lane.

Hint (3) The Mages gain the Buff Beam + Nature Pylon and actually score some kills via spiders and random Dijinn that like to hover during the end of each phase. Summoner Walls are specific - The Ogre and Orc block the Outside Lanes, the same Orc + Archer block the inside Lane. The Spiders sit on the corners so they can web the ogres.

TB Monk sits south of the Nature Pylon and can boulder toss to Hint (4) aiming high to hit the angled part of the wall. With 3k genie and ~5200 individual boulder hit you can hit boost and AFK each wave, TB stays up 100% even at the end wave of 3500 because the boulders stay airborne and hit the Dijinn waves. You'll know if the angle is right because boulders will stay bouncing high in the air. All classes used have 5.5 - 6.0k primary tower stats, with 2.5-3k in 2ndary stats. 6.5k TB. I used 2 afk summoners with double tower pets for safety but it wasn't really needed.