Armoury Bonus for classes below level 70 feels too low

[DevilsDontFly]

That is definitely not true. Especially since you're attempting to level a WHM.

1 - 10: Hunt Log with job quests in between.
10 - 15: Above + Guildhests + Guildhest roulette.
15 - 41: Above + Leveling roulette + Palace of the Dead.
41 - 50: Above + Beast tribes.

From 50 and onwards the idea is generally the same minus Guildhests and Hung Logs, but you'll replace those with Level 50, Trials and Alliance roulette.

That is completely ignoring the fact you can just dungeon spam since you'll be a healer, or any fates, etc.
If you have any outfits or equipment that gives you bonus experience up to a certain point + FC/squadron buff + food + EXP earring you can level up pretty fast.

To put into perspective a lot of the extras I mentioned weren't a thing on Heavensward launch, the dungeons did not felt as fast as now and the mobs health weren't adjusted at all. Started both DRK and AST at 30 but without instant queues since everybody wanted to try them at the time, and still managed to go from 30 to 50 in just a couple of hours to experience the main story as an AST. It only feels slow if you don't allow yourself to take some breaks and decide to dungeon spam for 8+ hours straight till cap.