Nighbane Run : what crystals can be clicked by stealth classes?

[ChickenChaser]

What crystals can be clicked by a rogue for example , without killing any mobs ?

You can using any class have the tank pull the full hallway to the 2nd crystal you walk behind (far enough to not get into combat)
Then invis pot right before you get to the doorway and walk up to 2nd crystal and click it and get channel off before mobs kill you.

I did it as a mage with cauterize proccing but I'm sure plate wearers could probably just live.