You may have to trick the auras onto the beam by building/selling buffs inside auras.

High stats build with completion times between 12 and 13 minutes

DSTs need to be stacked.  Point one DST at every spawn,1 straight north and 2 straight South...

I upgrade all towers with a tower booster while running boost

Final wave, I use 2 guardian summoners on each DST stack, builder App, and a tower booster

Most runs, South Crystal does take minor damage

https://steamuserimages-a.akamaihd.net/ugc/790865475053456508/38D1E7A47DC5662E12DF8AA4F9414F80CA27976C/