Though it would be nice if everyone started listing the level of crafting needed for the recipes.
I can't do a lot of useful recipes with 4-5 crafting/BS. Totally NOT going to invest more ranks into it unless it's super worthwhile, since I have no idea how much of a boost the "improvements" give.
Well, in the later game it IS super worthwile, for weapen/armour enchantments with essences, Tormented Souls and Tenebrium alone.
As I said before, my melee char for example has 100% resistance against all elements. He is actually healed by fire, water, air and earth. Also I have a +4 strength weapon with a huge damage (normal+elemental+Tenebrium)just because of crafting and the list goes on and on...