first build phase: place triple-auras on each core. (no electric needed on middle one) then beam on each core.
second build phase: towers and minion walls ( you can delay the spiders and mages if not enough mana)
after that just upgrade defenses and use Tower-Booster monk (TB).
check aura durability every wave if very low stats, i started this build with a monk 4k tower range, and around same for apprentice tower damage.
waypoint 2: if low tower dmg, some ennemies might come here, you can place a 4DU physical wall to block the two paths comming there.