Thank you for the advice, and that's exactly how I was planning on playing. Although, I am pretty much using ONE class for MSQ and then using alts for the sidequests, FATES, and Battle Leves. I discovered another plus from the level jump, I was able to get the Chocobo Companion early.
I do have another question though... having jumped one class to 60 using the boost... I have acquired both Samurai and Red Mage jobs... I absolutely LOVE Samurai. In DCUO I played a couple of powers that were 'combo' powers, so I understand how the system works. However, is it even possible to use Samurai or even Red Mage in lower level MSQ dungeons? I figure I could run the dungeon with SAM/RDM and then switch back to another class to turn in the quest for the XP. But, I'm not sure if you could use higher level class with lower level MSQ quests or not? I do understand that higher level skills will be greyed out for lower content, but would be nice to know if it were possible to even do.