Yay for mages!
I'd strongly suggest what Chubs said. Also...
- If there a few 85's in the ring fighting for the chest, keep sneaking in for it till someone gets it. Level 1's have no rez timer, so you can just keep going for it, and hopefully you can get it without an 85 noticing in time.
- Use auto-loot.
- If you still need it at this stage... try during Darkmoon Faire. A lot of 85's, and possibly even twinks, will be distracted by the big shiny chest that drops there - since both chests spawn at the same time.
Good luck!