My final stealth walkthrough within the murk of Wheloon Prison concludes with “Through a Mirror Darkly.”
More so than “Army of Shadow,” “Mirror” highly favors a stealth approach. I was able to retrieve most of the eight Orbs, needed to open the path to the boss, with no fighting. In fact, many enemies never knew I was there.
“Mirror” requires you to move through the Netherese headquarters using a mirror clickie that shunts you between the normal and Shadowfell dimensions. One advantage you gain in the use of the mirror is that, while it pulls you out of stealth, the mirror does not affect your Invisibility.
For a Ninja Spy with Shadow Veil (1 minute Invisibility and 25% Incorporeality) and high passive ki regeneration, this is ideal for moving into corner rooms, often filled with enemies, going invisible, using the mirror and sneaking to recover an orb and leaving a room without detection. You still need strong Hide and Move Silently skills to pull this off, otherwise, enemies close by may not see you but will certainly hear your footfalls, even in Sneak.
Moving about this way saved me once after materializing into a roomful of Howlers and their tender, bailing out before I became dog chow.
The boss fight works almost the same as “Army of Shadow,” in that the boss now moves between dimensions and sends minions at you as he leaves.
I changed the fight conditions by delivering heavy doses of Ninja Poison to DoT him while in the normal dimension. But when he switches to the other realm, I never follow him and let the Ninja Poison take points off of him. His Shadar-Kai minions on the Shadowfell side are more formidable than the normal humans I use to rebuild ki and charge up to poison the boss again once he returns.
The video is captioned as the others; click the CC if you don’t see them.