Green Arrows indicate the direction to point Seed Bomb towers. Yellow Arrow indicates the direction to point the DST. Put a Huntress/Monk Guardian Summoner on each tower stack. Bring in extra splits for pet waves (24, 29, 35) Based on this build for NM campaign.
Point 3: Harbs like to get stuck here. Not a problem if you have enough range, but can slow things down otherwise.
Note: If you have good enough range on Hermit, you can adjust Seed Bombs at point 2 to see eastern spawn, and replace the DST with an extra LT on point 1 and a reflect beam covering the eastern ramp at point 1.