Just to clarify I am using both MQ2 and Isboxer. Have been using both for a while, and am quite familiar with basic commands so yes I do understand that controlling 12 characters won't be an issue.
I am trying to make my base group first. Specially the tank, meaning once I reach 70 I want to grind as much AA as I can before challenging to the next progression content. I have read that Raid XP is not that great compared to Group XP (Although that post was back in 2012 so not sure how is it right now). I have played a warrior on many EQemu and live servers and they need a ton of grinding (I know that this server uses huge amount of AAs to upgrade items), and this is the reason I want to stick with 6 at first to have a good solid group before moving on to the next 6.
If the raid experience has been changed (I have searched the forums and couldn't find those changes yet) then I may start playing with 8 maybe 9 (have all needed classes + extra healer. not sure if extra tank is needed considering paladins can also tank to an extent).
Edit: That reminds me... is there any good zone to grind AAs? I believe I need some good chunk of AA before I start epic 1.5. And yes I am going to attempt doing it without the uber buff (Still yet to know how good those buffs are) people are kindly MGBing. Although most of the time they are buffing on zones that I have never been.