You need like at least 8k+ aura range for this to work im pretty sure but havent really tested, i use 8.8k 

place everything besides the owls and bring in a tb and 2 summoners with 2 huntress and 2 monk guardians(the auras need to be boosted by the monks or you instantly lose) i like to put my tb and summoners on the first 3 slots in my swap hero tab so i can just F6 them in instantly.

after you f6 them in i make my monk shoot towards a spawn to gather mana and then instantly start the wave to build the owls mid round, i dont bother moving the summoners 

this works on 23-25 28-30 but ive died a couple times on 32-35 so you probably need to change something in the build if you want to do that 

build example here because im bad at explaining: https://www.youtube.com/watch?v=hBoa8t2N7IM