Hint 1: 15 LTS

will need 2 sumoners with monk and hunt guardians.

also hint 2 is where you need to place the aura stacks. place where the Pin point is.

when you first start you NEED to max upgrade the buff beam and when round starts buff auras so they can reach the buff beams

you will probably only need to flash heal once every 2 waves with auras at 4k hp but if lower probably once every wave or so

if you cant see required hero stats for app they go from left to right excluding thp 6k/3.5k/4k