The reason they are 3 is because they are terrible compared to some of the other stuff you can equip. Harmonize isn't even a 3-4 turn skill.
Makers Muse, Fulfillment, and Preserve are really the only things useful for normal grinding from the level 10 skills. And anyone who is thinking of crafting for real should get them considering it takes under an hour to get to level 10 or can be done in 1-2 leve resets without even gathering any mats.
Strife Nii ~ Conjuror 49, Botanist 37, Mining 33, Thaum 32, Culinary 27, Goldsmith 22