Saw Caimen's build and it got me thinking, so had to do my own.
This had about 6:00 min total run time (with 4 splits in from the beginning)
1st wave, build warden pit, hermit web wall and mushroom, huntress oil trap, monk aura, and lastly EV buff beam and 2 SAM facing North, build the rest of the SAMs in combat, and just keep the EV in party for dmg bonus. You do need Tower Boost on the whole time. Not required to upgrade anything besides the buff beam, unless you want to.
Party: 1 TB Monk, 1 EV Builder, 2 Summoners with huntress/monk pets.