I’ve seen some guides on YouTube that say you can’t use phd, elemental pop, or wisp tea, but that’s not the case. I took off all the major augments for PHD, used the healing wisp for Wisp Tea, and used citrus focus for Elemental Pop with fireworks on my knife. I also made sure not to buy Mule Kick with zombies nearby just in case the bullets from the machine could fail the trial.