Buff beam on the left is 5 DU, the other one is 4 DU (use tower stack so all golems stand on the buff beam.
I start first wave with huntress with frost gun, so you can snipe the drag (no auto aim, you need to aim urself).
Then I go uper to upgrade everything with the mana on the ground.
For the rest of the waves, I use app with cat and emerald staff.
For last wave, start with spider queen. Make her follow you and follow the path (hints 2 to 5). Then kraken > Genie (he's immune to generic dmg) > Drag (when he stops firing fireballs, get back so his fire doesn't one shot you)
Can bring 1 more split if you feel confortable (never tried with more than 1)