Is it silly to level an Alt?

[KingOfAbyss]

You get a 50% xp bonus if you have any battle class higher level than your current one so it helps with leveling alts.

He meant having 2 diff characters, 2 Mains, no alts.

Like a Miqote PLD and a lalafell WHM. Bonus won't apply here.

On the plus side, you can enjoy 2 different town stories, and you should make some Gil.

I chose to stick with getting all classes (19 so far) on the same character to cap. You never know when the next Job (ninja?) will require some alts to be lvl 15, and some cross-class abilities gained (sometimes need up to lvl 34)

I won't ever have to worry about it.