5 man team

Hi, recently decided to move up to 5 accounts. There are a couple of compisitions i am trying to decide between. current toons are as follows Acc1: druid 80, shammy 70, dk 65. Acc 2: Priest 76, Shammy 70, Mage 60, Druid 60 Lock 45. Acc3 Warrior 70, Druid 60 Lock 45. So i have a few options to change out later if i need. The 2 groups i was concidering leveling from 1 were 4x lock & disc or shadow priest, which in my head sounds good swapping one lock out for warrior tank at 70 or druid at 60. And the other is pally tank, lock, mage, boomer and priest healing. I have been boxing 2 and 3 toons for a little while now. The buffs/portals/ss/cc/summons of the mixed group sound good, but is this group going to require too much micro management to do heroics at 80? Any input would be nice as i am quite torn between the ease of option 1 and the utility of option 2.

Second problem is i have 4 accounts without raf active, any idea on the best was to get the toons to 60, either getting 2 extra accounts to get RAF on all 5 and xferring at end or just activating last account and use warrior/druid to boost then switching out with druid at 60, this is more a time issue really will warriors dps > triple xp.