Next time (or for anyone else starting an Alliance mixed race team) I would just run the elves at level 1 straight to the dwarf/gnome area (leveraging the short cut) and then to the human starting area (assuming you have at least 1 of each race). If you do the bare minimum on the way (just explorer XP) the elf will be at most 2 and if you follow the FedEx path the others will catch up that level as you go because they will get the explorer XP that the elf already got (and the elf will not).

That way you can just take everyone to 12 once.