Other version of armor farm for this map: DunDefPlanner with Minions for Ruthless or for low stats
Aura setup:
a) Place all of the auras.
b) Place a boost beam at 1 and upgrade that beam to max.
c) You then have to place a temporary boost beams on the auras stacks at 4 and upgrade until they touch the maxed boost beam. Once they reach, sell the temporary boost beams, all the auras should reach the central stack/boost beam.
Hint 5 - This line of minions is there to soak missiles so they protect the App towers.