What does this information mean?
This instance gives you the choice of a Heroic version also. There are no lockout timers for this zone. You may re-enter over and over as many times as you like, until the door vanishes and you must find it again. The outside of the door will be guarded by a single tainted scorpion (38).
This is the only roamer, and also the only mob all of the rest are social with. Wait till he gets near the B on the map and body pull him at least to the A. If you spell or arrow pull him from anywhere else all or most of the rest will join him.