Build all besides ogre minion and hint 3 warden towers during first build phase. Can swap ogre and hermit golem if wanted but I've found healing my warden towers on hint 1 to be more helpful and consistent. You may take a hit or two on the middle crystal near the hint 3 towers before getting up warden towers - that is normal.
Have 1 DU left, can place a reflect beam on hint 2 to prevent damage from djinns during waves if needed. Once hint 2 is upgraded I wasn't taking any djinn damage.
Hint 1 : First warden tower stack, one cloud facing towards crystal and the other at the spawn on the floor.
Hint 2 : Second warden tower stack. Make sure to place the 3DU physical beam in order to block the desert cupid's attacks and make sure you can tower + hero boost during boss.
Hint 3 : Third warden tower stack. The two clouds are facing wyvern spawns to speed up round time.
Boss wave : Brought in two apps with no guardians but running an app guard and huntress guard would probably be best. Brought dps app and tower boost monk to hint 3 for boss. Use tower and hero boost for the boss firing at the boss with the monk. Kill boss with app and pray for a good staff :)