Quote Originally Posted by Niwashi View Post
All but one of those classes will automatically get the XP boost anyway, regardless of whether you buy the level boost or not. So you'd be paying just to get the boost on one more class. (Personally, I'd find that benefit too minor to make the purchase worthwhile, but there's nothing actually detrimental about it so long as you weren't going to play the selected class anyway.)

And if you do have the xp boost on all the classes you're playing, you'll have to be careful about alternating which you use for content. If you try doing all the main scenario quests on a class with that XP boost, you could get pretty far outleveled for the quests you're doing. Since you're planning on leveling multiple classes concurrently anyway, you can avoid that problem by doing a few quests with one class, then the next few quests with a different one, and back and forth like that. You just need to give a bit of thought to which you currently want XP on when deciding which to play.
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.