1. A DST pointing at each Core, stick the towers as far back under as you can so they're safe.
2. HP minions are best, two Ogres and mages to heal.
3. MU can be filled with archers, stacking on the end of the buff beam if needed. (((Or another option is to build a wall of ogres so the boss doesn't get too close to your wall. if you plan on using this build to kill the boss))).
4. Boost summoners sit on west side of towers as to avoid getting smacked.
Auras will fall during wave if they're not repaired.
(I don't recommend it, but supposedly this build has been used to defeat campaign with 3k stats. Hiding while constantly repairing walls and ogres, lol)