

I just tested it (attempting this run now using Mage for the warping beacon), and yeah, Phase Shift paralyses you for 10 turns even when you self-cast it. So that is not an option.
As such, Blink stones are probably the best bet, before or after a Warping Beacon to get to the stairs ASAP. I’ll update the post afterwards with how my run goes.
I just finished the run successfully. Mage’s Warping Beacon is 100% the best strategy for this; I cleared every floor in under 10 turns. I updated the original post with my run
Enemies were no problem at all. If I ever got cornered I just used the warping beacon