Summoner: 4 archer minions, 1 mage and 1 spider

Apprentice: 4 LT's and 3 DST's

Wave time for me is around 75 seconds (except boss wave, ofc.)

To improve completion time:

Place auras (while getting every chest), switch to huntress and place the two traps. Switch to ev and start the first wave:

Hint 1: As the wave starts you want to place the first buff beam here and proceed to make the physical wall. After this run to hint 2 and make the rest of the buff beams counter clockwise on the map.

Switch to summoner and place the minions. 

Switch to apprentice and start the wave. Place the towers and the build is complete. Begin upgrading everything - after wave end, get that jester with a genie out ;-)

Hint 3: In the boss fight you'd want to kill the two snowmen coming here before taking out the rest of the bosses. They remaining 6 bosses should all be gathered at hint 4 or close by.

My stats:

Summ: 5k dmg and hp. Side stats 2-3k

Ev: 5k dmg and hp. Side stats 1.5-2k

Monk: 6.5k dmg - rest is ~3-3.5k

Huntress: 5.5k dmg - rest is ~2.5-3.5k

Apprentice: 6.5k dmg, 4k rate - rest is ~3k.

(This build should still go throught with lower stats)