Note: Required Stats are my stats, you could probably get away with lower stats.

All Golems on the Pylons and all towers fully upgraded.

Not AFKable by any means, this build is meant to last as long as possible, hopefully long enough to kill the boss before your defenses collapse.

The build is probably more comfortable if you spec your hermit into THP but I didn't bother with it.

For the Boss, ALWAYS USE THE BALLISTAS, as of Patch 10.5.8 the dragon deals 98% less damage to towers with the fireball attack when on the platform, meaning if you want the build to last as long as possible you want to hit the shots as soon as possible.

Build Phase: Build everything except the Golems and Pylons.

First Wave: Hermit and TB. Finish the build with the mana that your TB gets.

Second and up to Boss Wave: Adept Upper and TB. Upgrade everything.

Boss Wave: DPS App, TB, Hermit Builder, Monk+Huntress Summoner. Spread away your heroes and put your TB away from the LT stack. Make sure your Tower Boost is up before fighting the Boss. You can shoot at the boss while it's flying, you just need splash damage or something that pierces walls (i'm using a Bouncing Heart Staff).