Yes I do the same. I HATE the highest level (L5?) Ixtal quests, so I do 3 L3 and 3 L4 for my 6 beastman quests. By making sure I'm the crafting class that I want to level when I turn them in, I'm able to make almost a level a day.

When the quests first came out I was already level 30 in all my crafts. Since then I've leveled 2 all the way to 50 and my 3rd is at level 46 or 47 right now. I'm planning on leveling the rest of my crafter's this way.