From 60 to 70 armoury bonus will become 100% XP if you already have any combat job at 70, Plus 30% from the pre-order earring, at least 15% from squadrons, whatever bonus from full rested and food. By doing tribes, SB hunt bills and level appropriate fates while waiting for dungeons should be fast, really fast.

Also, the only reason MSQ roulette is so rewarding is due to un-skippable cutscenes.