Completed with builders 2.5-3.5k stat averages. Can kill boss with ~3k hero stat monk or barbarian. Can ALMOST clear map with 3 afk. Boss was at 500mil/1.2bil most recent attempt. Boost monk with a mega chicken seems to be the best option on this map due to the crazy amount of ogres. Aura radius ~3200
Areas to look out for:
1. If the boss wave lasts too long that minion wall can get beat down by ogres if you don't clear them out periodically. Also bottom left corner of minion wall should be as far from crystal was possible while not allowing ogres to pass through.
2+3. Djinn will attempt to desummon in this areas before lightning towers are up. On 4 player I believe it takes more damage to knock them out of channeling so don't let too many pile up in those areas.
4. Try to keep the boss in this area so he doesn't kill your minions.