Artisan Archive

It is a good question that has been posed here. As a Novice Artisan, I am now an Engineer, a Businessman and a Surveyor. I learned Domestic Arts I so that I could create Fiberglass Panels which are essential to Bone Armor. That alone was worth the 500 Experience points and 2 Skill points. But I don't know if I should do Domestic Arts II - IV. How essential are the Micro Sensor Suite, Electronics Memory Suite, Electronics GP Module, Power Conditioner, Energy Distributor and Contol Units? Would it be easier to purchase them versus learning these 3 Skills and making them myself? This is what I don't know and my entire decision rests on those few items.