They will level up with the upcoming Mastercraft Demimateria II which will only be gotten from i180 crafting/gathering gear. Also, just like moonstones, you will need to do Splendor Dailies to farm 40 Superior Moonstones of which you get 1 daily. And finally, you will need to craft 30 pieces of HQ turn ins (Astral Superior Hippogryph Strap) made of 2 stars materials, at 2500 difficulty, 60 durability and 32.000 quality.