I've never used the Specialist Abilities at all. They're not even on my hotbars. If I am able to craft everything using the abilities that come with levelling crafter up to lvl60 then I don't need to complicate my life further!

Of course, there's some excellent theorycrafters in this game who help everyone with the more complex parts of crafting. I always try to find my own rotations before using, say, Rath's 437CP wonderful creation. That's all part of the fun to me.