the stats needed is literally just a fishbowl on a naked hero. I bet you can do it with even lower if you can finish all the building and upgrade the buff beams and lightning towers to 3 star in 2 waves. adding more players makes it tougher, recommend an additional +70 tower stats for each player on. 

great map for very high quality myth-trans armor and the random pet drops have a high chance of guardians, imps, and genies which are all very useful long term. You also get librarian drip (mask accessory) as well as a couple random weapons. This was my first map ever on nightmare and beat it first try. This map also gives you a taste of ULTIMATE wall decor (core drops but they kinda useless good for flexing on tavern). If you can manage this stage, you can get up your heroes to lv 83-90, which is what my friend rolo did. Budget tinkers as i liike to call it. BTW DONT GO NEAR HARBS THEY KILL YOU IN LIKE 2 FRAMES EVEN WITH HIGH RES!!!!

Really fast paced - gonna be active all the time. The blue and green arrows indicate the ogres paths. If the LTs are too far east, ogres take the blue path. Green path is generally safer and cheaper since you DONT need the minions at HINT 1. Place the buff beam and LTs as close to the crystal as you can so they dont get hit by ogre aoe. Why do we not use mages at west? well ogres have negative brain cells and 99% of the time they DONT attack the minions that are  blocking it. They just stare at Lts/Crystal. And if you are REALLY worried about the stats, the minions i had were ~40k hp. The archer pairs at west take serious damage from dark mages the first 2 waves - watch out for that!

Hint 2 represents where the  harbingers stay. They detect your towers from extremely far away so they get stuck near the enemy spawns (they can still take damage despite being inside the magic circle). And 99% of the time they stay there for the entire waves duration as long as you do not aggro them and they have towers to see. So the harbingers basically lob lightning balls at your minions and hardly deal any damage. Whats dangerous is their player damage. Even if they are not chasing or targetting the player, any nearby player WILL TRIGGER its secondary attack which is like a lightning tower. This kills you in less than a second and CHAINS to nearby heroes. Stay away from the area boxed with black lines. That is roughly their player-lightning range.

after trans armor on your builders go for kings game armor farm (only summoners + guardian boost). Good luck!

sorry for writing an essay again o_O