not really, everyone I know always has something at a close level so we either party or take turns power leveling. I have a Pld, Sam, MNK & RDM at those levels.
Have you tried timing your nukes, slowing them down a little so the tank can hold aggro. Give the tank a chance to they may have been a former mage just getting the hang of tanking just as you may be a tank just getting the hang of being a mage.
Give it a chance, worst case scenario you can go solo in Palborough Mines, Dangruff Wadi, Konoschat Highlands or La Thiene Plains. Or grab a few good friends and head to the Maze of Shakrami (I can't be the only old timer that remembers early leveling in there off the worms)