Party setup: 3x adepts with 2k+ purity bomb (could be 1 apprentice bomber in frontline to damage harbis and ogres), one of them must be with monk guardian; Dps monk, preferable with melee hard-hitter like mini demon lord on top crystal. Tried with 4 adepts - not enough pet damage to kill last orc spawning on top crystal.

Hint 1. Put here your Monk guardian adept to boost  your auras range. 

Hint 2. Top floor block paths with archers, put dps monk on or before the upper floor crystal.

Keep an eye on strength drain aura, on last wave drains very quickly. Use purity bombs if you see large enough amount of enemies, heal blockade on sides if they get damaged.

On 1st to 3rd wave. I run with dps monk 300k hp with ranged pet on 1 and 3 waves and with cupid on 2nd (to outheal random rocket shots). On 3rd wave you could heal behind coumns.

Bring mana crystals with your builders after 1 or 2 waves, die in spikes after defeating genie - you'll revive inside tomb near forge.

LIsted required stats - its my current stats, probably could be done with less stats, because nothing really get damaged.