Stuck @ 57-59 SCH due to no sidequest (all completed when leveling MCH)

[Reinha]

I level alts with:

Leveling roulette
(High, trial and main scenario roulette if you need variety or tomes)
The highest possible HW dungeon
Fates (don't forget chocobo: when you get choco cure things get really easy)
Clan marks 1-3 (total over 300k xp per day, again take out chocobo for help)
Challenge log. Keep an eye on this after reset and make sure you get all bonuses on the class you are leveling. Rewards are around 50k-80k xp. You should get the chocobo entries done easily by doing fates and clan marks, which gives him 15% of a rank "for free" every week on top of monster xp.

Mix it up and it won't feel like a grind. I would recommend using leve allowances on crafting and gathering. It's extremely cheap to level with those, because crafting leves give you back shards and useful materials (often more than you used up). Edit. forgot to mention you can get crafting and gathering xp bonus from your GC quartermaster. It should only take about a month to get 2 crafting classes to 50, and then you can make and sell low level DoH quest items and HQ leve items for easy money.