Armorer or Carpenter?

[BaconNarwhal]

Armorer's 50 skill, Piece by Piece, might be used situationally as a first step for synthing on 2-star recipes with difficult progress bars, and it's up to you if the grind is worth it. (50 ARM here and never used it) ... Rapid Synthesis is good but you can do fine without it. Carpenter skills are much more useful.

Ingenuity + 3 x Careful Synth will complete those 2 star items, no need for Armorer's 50.