Most of the old information still holds up. Leveling crafting happens in phases. 1-51, 51-61, 61-70.

1 to 51 can be done with a basic rotation that relies on cross class. Getting all 8 classes to 15 is still the best way to go. If you plan to level all 8, getting them all to 18 is my suggestion. At level 18 on all skills you get Standard touch. It's the quality skill that has 80% success so you can steady hand, standard touch with 100% success.

Inner Quiet, steady Hand, waste not (leather 15)
Standard touch x 4
2xCareful synth (weaver cross class)

This not only improves the chance of HQ but increases experience through crafting.

Crafting and Leve for 1-50, raw grind to 51. That's not as bad as it sounds. 33x3 bouillabaisse will get you pretty close to the level and the bouillabaisse will serve you until you can make baked onion soup.

51 to 61 you aren't trying to fill the quality bar through brute force like you do up to 51. You need to stack inner quiet and Byregot's Blessing or Brow if you chose to only level culi. Either way the stacking is the way to go.

61 and on seems to be a version of 51-61 but they are adding more in class abilities. Careful Synthesis III for example happens at 62 and it allows you to clear the progress bar with 2 hits on basic stuff in the Storm blood recipes. It's still inner quiet stacking for a blessing or brow.

Gear always matters and having all 3 gathering will make things much easier on you unless you are sitting on plenty of money.