They patched the methods that Mystina used to use (or the ones I knew about) a long time ago.
Was fun when it was in game but people exploited it. With the glitch it was possible to solo every mob in the game on ARC (even level 99 ones) without risk of dying.

But on topic. Would be cool if you could. Personally I hoped that they would open up some of the extra paths in Dzemael Darkhold at some point.
I explored it loads back when the glitch was in game and the area we get to access is easily less than 25% of the dungeon.