This cooks pretty good. Ruthless mob count is a little low, but plenty of chests (7) Pet's are ok. I am debating still on the mushroom spore tower, could swap it for a Mortar Facing South East...or swap a LT for a Mortar...either way, the build was solid and fast, so might not matter, I just need to monitor the spore tower, if it's getting hits or not. Run around between waves and repair the traps.
I wouldn't change much of anything for Nightmare, maybe could drop the electric auras for another LT, or something else...but play with it if you do and let me know. I think I'd recommend that, for NM drop the Electric Auras and add another LT.
Party: 1 TB Monk, 3 summoners with monk/huntress pets
Hint 1: main stack with 2 summoners here
Hint 2: West Stack with 1 summoner
Hint 5: TB Monk stands here to boost all the defenses Minions are optional, but can help with Ogre Agro there.