Optimized quite a bit, this build seems to cook pretty hard.

10 chests, Very low mob counts, good pets

Really low mobs per wave, holds this back as a great PS option, but makes it pretty fast as a total run.

Party: 1 TB monk, 3 summoners with guardian pets (huntress/monk), 1 at North stack, 2 at South Stack

Hint 5: TB monk stands here to boost both stacks.  TB did not need to be refreshed, except in the last few waves, so like waves 32+, but you gotta have it up during rush time, or you're cooked.

I am getting some hits on the north stack, but simply flash heal or TB it and is fine.  If you want to add reflector beams to the stacks, take out the nature's pylon and build reflects with that DU I would recommend.

Some other options:  You might be able to drop the slow aura on the North crystal, but that's only getting you 3 more DU.  I might attempt to just drop all slow auras, to see if we can cook faster, but not sure that really helps us that much either, and only gives us 6 additional DU, which maybe could be used for gas trap...idk somthing to think about.