The pylon must catch the auras from the east and also hit the towers that are on the buff!
I recommend not doing Golden Enemies starting from wave 33 — after that, it gets dangerous!
To be honest, this build is for high tower stats, that is, if you want to keep doing Golden Enemies all the time. I use 2 Jesters — one with Hunter's Guardian, and one Summoner with Hunter's and App Guardian!