Build Description
Start wave 18. 1 buff on both auras, 1 lt stack on end of buff beam, dst stack on the other end doesnt matter where. Just upgrade buff beam then afk.
Keep Apprentice in after build, bring 2 booster summoners (dst, lt) and 4th doesnt matter what it is.
For the Super Lazy: If you dont want to move your other characters, position buff beam like 2 to buff auras then like 3 to buff the auras then sell the #2 buff beam and be in correct position for the booster summoners.