High-ish Warden stats needed from what I can tell.
4 Characters:
Summoner (Huntress/Monk guardian pets) at Hint 2
Summoner (Huntress/Monk guardian pets) between Hint 3 and 4
Builder Warden on the Defender's Forge (southeast of the southeast crystal)
Builder Guardian on the Defender's Forge
The Hint 2 tower stack and beams are on the doorway/entryway overhang thing. The Ensnare Aura in this area is sized down once and is south of the Strength Drain and Electric Auras.
The Blue Arrows are the directions of the Cloud Towers.
Build with your Guardian before you build with your Warden as you will want the Owl Nests down first for building ease.
If you have a lot of range on your Aura Monk, you'll probably want to respec the level up stats from TRange into TDamage instead. You don't want either of the Ensnare Auras to overlap on the spawn points.
During the 1st Combat Wave, have the Hint 2 Summoner out with your upper.