Most of the time when you go into POC you're gonna have at least caster speed and Pally sprint both at your disposal. When the shades pop, as said in "Monty Python's Holy Grail" just run away, run away. Epecially if you are on your way in. After the spot where the shades pop they're aren't any other mobs that spawn before the portal. If you kill the shades more spawn in greater numbers, and it's a sure fire way to get your group wiped.
Well ... actualy the shades look like a player from other realm ( we r from alb and fightet several shades only midgard pops ) . U will find out that NOT the watcher's pop the shades ... we had a shade in engage ( we try'd to hit her for 2 min or so .... cannot be attacked ) looking like a dust ... after 5min of engage he startet to pop shades over us ... we manake to kill them 2 times ( poped like 4 or 5 shades ) after we run toward the SH entrance ... and died by the guardian mob in front of entrance ( something with Z ) Have fun there :)
These are purp to a 50, so 55 isn't on the mark. Three of these popped on my group of 6 after a watcher (a light orb that hangs up near the cieling of the dungeon) saw us and took off down the hallway. So if you get the spam that a watcher glances at you, a shade will be popping soon.