Hint 1: Build area is on the bit of honeycomb tha sticks out of the West core building.
Recommend all supporrt towers first and building owls mid wave on the 1st combat wave. You have enough mana to build 1 owl nest on each bb during the first build phase.
Hint 5: Interchangeble ways to use your last 4 DU (Gas trap OR Seed bomb, not enough DU for both). Note: the Seed bomb if used gets placed on the overhang so that it has LOS on the West core.
TB is not required (stat dependent). Recommend having your Owl builder out after all is upped.
Barb + CTA + Shrine makes quick work of wasp boss if you intend on farming swords.