If you get the gathering professions mining, herbalisim and skinning I would definiatly put mining and herb on the main it's so much easier and skinning on an alt. I have missed leveling herb because its on an alt and I always run past the herbs and forget about it.

also a mixed group can be great but someone on the front page had a great idea start at level one with the team. It will be slower to level but the practice you get with the team will be huge and save a very frustrating time trying to master a group.

check out http://www.dual-boxing.com/wiki/inde...etting_Started
and http://www.dual-boxing.com/wiki/inde...lly_Kill_Stuff

They were a great help to get set up but remeber you maynot have all the spells abilities at low level so a little tayloring will be required.