Vanish being key for DMG but unsafe to use in PVE sucks

Just did the waves thing and almost broke it a few times until I broke it for good, using vanish.

It just sucks, especially in this "solo content expansion". So much of my class' power is gated behind being in stealth, but if I use vanish all mobs reset / bug out. Yea, you can work around this with stuns but if the enemy is immune you can't do anything.

Here we see the final boss of the wave mini game completely broke. He does not attack, I cant not attack it. Sucks so hard, man.