Manually join another player's instance

[seraseth]

Yes, I realize that. But you can't teleport anywhere once you're in that zone. If you get disconnected or log off and log back in, then you also often end up in separate instances - which necessitates hauling but across to a zone line, zoning back in, and then running all the way back to your questing area. It's absurd.

Once you're in the same zone you can use the teleport within the zone safely. Me and my partner would walk across the boundary line to end up in the same zone, then use the teleport within the zone to cross faster.