I see no reason why those would give Mastercrafts. Mastercrafts, so far, have only been obtainable from endgame crafting/gathering gear that required heavy amounts of turn-ins to get. Artisans and Foragers only, so far. I can see them being obtainable from the Ixali i70 gloves, but those are currently set to Desynthable: No. I really hope they change that soon, as it would give LTW a way to get Mastercrafts, leaving only CUL with no (known & confirmed) way to get them.