If not for MOTW I would not have picked this up I think.  I was doing auras and traps, but found I could still win with just auras (and some owls at center), which is a much faster build than running the whole map again with trapper.  Summoners make sets of auras huge and melt all spiders, owls pick up any stragelers.

Party: 1 Upper, 3 summoners with huntress/monk pets.

Build is 3 auras at the 6 locations.  Center location gets some owl nests as well.  I had a dmg-aura monk and a range-aura monk, but that's too slow, so I just build with the dmg-aura monk (and I repect'd some of his stats into range).  

Get all the build up on first build phase (run fast), then swap to upper (either Adept or Jester) and upgrade everything.  I just kept the upper in the whole time.  I found it runs faster with all splits in from the start, so put your summoners out first wave as well.

The center locations seemed to be the biggest headaches, so I position the summoners on those three spots, waves are fast, so some runs I never get to swap out the upper before the end.  But as soon as everything is upgraded you can swap to 4 summoners and move the 4th to any of the outer spots (South is probly best option)

Hint 4: where portals spawn

Hint 5: Put summoners at these markers

Best time so far - 9:31 (4 splits in from the start)