Forget all of that level 50 cross class skill stuff. Byregot's? Careful Synthesis 2? Comfort Zone? Forget those. You're still leveling your highest crafting class, those skills do not apply for you yet.

The best advice I can give you is to bring all of your crafting/gathering classes up together, at least Goldsmithing, Weaving, Leatherworker, Carpenter. Armorer goes hand-in-hand with Blacksmithing, so include that as well. Basically, you are going to want stuff that they all make.

Make your own crafting gear, and make sure to HQ it. That's where the Goldsmithing, Weaving, and Leatherworker come in. Carpenter .. that's more along the lines of Armorer - to make specific materials for you when you need them.

Get all of the crafting skills to 15 to start, this gives you an excellent foundation of cross-class skills for your future endeavors. Culinary to 37 for Steady Hand 2 is STRONGLY recommended, but is not strictly speaking, required. Otherwise, just take each of the crafts I've mentioned that you are going to want up in five or ten level increments, using the Crafting Log, and then using Triple Leves when the Crafting Log does not suffice. By maintaining your set of crafting gear, you will have the stats necessary to get the recipes to HQ most of the time. When you hit a level that has a new piece of crafting gear from any of those four crafts, be sure to make it HQ, and to start to use it. You should be able to HQ 8/9 or 9/9 of all of your 25+ Triple Leve hand ins