This is a modified build of a smiliar setup that mainly adds an aura stack on the north crystal if you are having problems with stray mobs killing the crystal there. The benefit of this build is its ease of use and maintenence.
Round 1: build all auras, buffbeams and golems. Build 2 clouds - one facing north, one facing south. Add in upgrader, and start wave. Feed your warden mana so she can complete the build.
Regarding the aura stack north: add a buff beam that you make tiny and place as close to the edge of the map as possible. The point is to not have it be stolen by djinns. Depending on your stats, you might have to repair the north aura stack between every wave.
In the build phase of the last wave, I like to have this team composition: