When not raiding, your FC should have a a level-2, or even better a level-3 XP buff up, and Meat & Mead II buff to extend food durations. Food should be consumed anytime there is leveling activity.

If you manage your GC squadron there is also level-3 XP scrolls you can earn weekly, which is equal to the level-3 FC XP buff.

Obviously there is the up to level 25, 30, and 50 equippable pieces that can be used to get more XP. It works even when you are sync'd to those levels.

Some people leave so much XP on the table and you have to remind them to eat food too.