First map build i have ever done so bare with me. I've not tested this build with low stats but i would not go 3 toons if you are noticeably lower than my guestimate numbers i put. But feel free to test it. This is just the build I personally use. Also i DO NOT TOWER STACK so this has been used for vanilla tower placement by me. And i flash heal usually twice during the build phase since I don't need the healing summoner anymore.

Hint 1 Move aura's to the south east side of the south crystal here after middle crystal explodes.

Hint 2 Move north proxy trap to as far left as possible there after middle cyrstal explodes.

Hint 3 Move darkness trap there after middle crystal explodes.

Hint 4 Have both your guardian summoners in those positions that are on the 9 lightning Towers. huntress guardian with your choice of either apprentice or monk as the second on each. Just make sure the aura's dont accidently get buffed by monk if you go the monk route. The 3rd summoner i use a spider and huntress guardian to buff my aura's and kill any stuck mobs end of wave with the spider but feel free to use a djinnlet/ imp if you have stats to low to survive the wave without repair if you go with 3 summoners in. However if you decide to only use 2 summoners then place the one with a dps pet + huntress guardian in one of the spots on the lightning towers.

Hint 5 the minnions and buff beam  proxy and relfectors are UNDER that walkway.

Other notes. The north buff beam with the minion and the lightnings are both 5 DU while the south minion buff beam is only 4.