My experience is crafting Synthweave from 1-100 making all 3 blue schematics for each green in crafting levels 1-40. That is all gear that is minimum level 9-13. At crafting level 60 the ingredients switch to Tier 2 and minimum level goes to 15.
Now, I know there are Tier 2 nodes on Coruscant (and would assume like-wise for the Imp homeworld); but can not find nearly enough to farm to grind these post 60 (and minimum level 15) items any farther. I think the only way to keep up to level items, then, is to have another character as gatherer of a higher level.
That is just my experience. Obviously I could just focus on the few items I actually need and probably keep up with the post level 15/Tier 2 items, but I think I get where the OP is coming from. If you want to make it all, you simply cant.