We've all wiped in an instance from time to time. It is significantly easier to keep going when a rezzer has a self-rez ability so the group doesn't have to waste time running back to the instance. Soulstone and Reincarnation are wonderful things. The Druid's Rebirth spell can also be used occasionally to save the party the walk of shame back to the instance.
I call this maneuver the "Hail Mandy." I started doing this when I was multiboxing my Paladin and Druid. When the Paladin, who was tanking, died and the Druid was going down, I would cast rebirth on the Pally. Then after the Druid was killed and the mobs reset, I would accept the rez. This allowed me to raise both characters and start back up on my merry, dualboxing way- just like using a Soulstone.