I am currently leveling a group of 1 pally and 4 shammies by a combination of instances and questing. All are pretty low level (24). I wondered if it wouldn't be faster to replace the level 24 pally in the group and replace him with my level 67 pally instead. The question is would the experience loss from having a high level char as a part of the party be offset by the ability to go into areas that I couldn't go with the lower level group?

Thanks in advance for your thoughts.