SMN/SCH get less FATE XP than other jobs

[AskaRay]

I am glad I chose to level my SMN first so used mainly quests.

If you are leveling it first you aren't getting the armory bonus, so...

[ZodiacSoldier]

If you are leveling it first you aren't getting the armory bonus, so...

This, I checked your profile and SMN is your highest level job so it doesn't get the Armory bonus.

All your classes / jobs that are under level 50 will get a 100% XP bonus and when you are level 50 to 60, they will get a 50% XP bonus as long as they aren't you highest level class. In other words all the class / jobs you level after your first will get extra bonus XP. Below is a description of Armory Bonus:

Armory Bonus

The Armory Bonus is additional experience granted to any combat class you have that is NOT your highest level class. From levels 1-49, you receive +100% additional experience for secondary classes that are lower level than your highest level character. At level 50, this bonus decreases to only 50%.

The bonus applies to kills, FATEs and leves. The amount of experience granted has nothing to do with the distance in levels from your highest class.
Additionally, the +10% experience from The Heat of Battle II (FC buff) - will stack on top of this buff to provide an additional 10% experience. So the Armory bonus is 110% (armory) + 10% (fc buff) instead of just 100%, while the FC buff is active. This is different from the other bonuses, as they do not receive additional experience from the FC buff.

The Armory Bonus, as previously mentioned - does not apply to non-combat classes such as gatherers & crafters.

Examples:
Your highest level combat class is 20. You are playing as that class. You receive no armory bonus.
Your highest level combat class is 20. You are playing as a second combat class that is less than level 20. You are now receiving armory bonus exp.
Your highest level combat class is 20. You are playing a second combat class that is also level 20. You receive no armory bonus.