Honestly, if you want to do endgame crafting, you'll have to level up all DoH classes to 50 anyway. If you have limited time to spend in-game, I strongly recommend doing the daily Grand Company turn-ins to get crafter exp. You can also do the Ixali Beast Tribe Dailies to get good crafter exp. Also, crafter leves give tons of experience and can be done rapidly if you pre-craft the turn-in items, and make exclusively HQ ones (don't do the triple-turnins, do the singles or couriers).

But, if you just want a ton of NQ mats of specific types (like, Boar Leather), you should /shout in a city and see if you can find a crafter who will make you a bulk order of the item (99-396 depending on how much you'll use it) for well under the MB price. This can be done by the crafter via Quick Synth while afking, and they'll get some HQ items they can keep and sell on the MB. I know I'd do this for you if you were on my server, for a fair price.