Physical beam on the west starts on the stone near the tree, abit inside the room so that if an ogre is stuck in the corner closest to towers the Wisp Dens have line of sight to them
Physical beam on the east starts on a kind-of-crevice in the wall and almost reaches the "water path".
Can place an Ogre marker 3 but should not be needed.
Waves:
First wave TB + Upgrader.
Remaining waves TB + (Warden builder or Summoner with 2 Huntress Guardians). If Warden Builder Wrath when TB is down.
Last wave TB + Warden Builder + Summoner with 2 Huntress Guardians + Wheeler
Big thanks to Banana4Life for showing me the build!