1) If you're only focusing on the boss and doing no NM's what so ever then you may as well get everyone SJ/Abi/Magic. Weapon is not as important.
2) A good group of 7 is definitely good, but if you want to bring more that's fine. I don't think time will really be an issue. A BLM or 2 will speed up the 6F by a lot and make boss go down faster as well. I think it will make up for the extra farming on 1F and 3F.
3)For your monks: have them stand right in front of the boss and right on top of each other. Then just make sure they don't move. Just have everyone else stand at an angle (avoiding Diffusion Ray) above 10' from the chariot, and below 10' from both of your monks. Only your BRD may ever be out of range when he wants to sing ballad to the mages.
XI Wiki


purely time wise it is inefficient to just farm 3 MP cells though if you still got time to spare ;p
