setup the entire build in the build phase, the mage is placed under the moving gear on top of some rocks so he cannot be hit and killed
w22 upgrader, tower booster, 2 summoners both with 1 huntress guardian and 1 monk guardian each boosting 1 stack
if you have finished upgrading swap your upgrader into a third summoner that holds a squire/apprentice guardian and boost hint 1, so you will have squire/monk/huntress/apprentice on hint 1 and a huntress/monk on hint 2, tower booster goes in a corner on hint 3.
havent tested on nightmare idk if its even worth playing
video of the build setup and first wave here: https://www.youtube.com/watch?v=cBuP2sXqfcA