Video: https://youtu.be/3SdYhVtOMR0

This is a quick AFK build on summoner. Max the buff beam before starting. At the start of the wave, buff the auras into the buff beam with your monk guardian, and you can upgrade the electric aura once while buffing it with guardians to rate bug it with your huntress guardian. 

Aura placement might have to be adjusted depending on your monk's range. Mine is at 8k, but my placement definitely works with below 8k range. 

Also, EV walls amount of DU doesn't matter. You have 9 DU to place them, but they dont need to be 5 DU and 4 DU. Can even be 3 DU walls. Doesn't matter, they probably wont go down anyways. 

Then I just AFK on summoner (monk + huntress guardian), buffing LTs. 

This works for Little Wizard (wave 23-25) or Evil Eye farming (wave 28-30). 

Being on summoner only isn't required, but it's quite nice as it is AFK, and you can get armors on the second wave (I once got a ++ doing this build).