I had a same similar situation. I have 6 accounts, on launch of classic decided to reload 4 accounts, boxed up 2mages 2 warlocks to 60.
reactivated the other 2 two so i can roll a trinity team of WMMMP. With the ability to change this to a MMMMP due to the 6th account setup.

I boosted/driven the wMmmp (M) being the 60 to about ZF level, then from that point onward have been learning to warrior with the 60M taking aggro and tanking at times. Working for me to learn from the warrior point now rather then got to 60 and learn then. That being said when i load up the mMmmp team driving from the M or the p wont be an issue pretty much same same as when boosting.

my 2 cents