Dungeon Defenders | No Towers Allowed Crystal Cave Ruthless HC (4 Splits)

There might be better strategies out there, but this is the way I do it. It is risky and I think you need good stats for it. Try to prioritize demons above everything else. Shoot spider queen at similar times to the ones shown. Lastly for kraken, place your monk at that exact spot so that kraken doesn't send your heroes flying across the map. Time your first piercing shot so the kraken core opens when he's near your monk.