The killer is 7AP. If it was 3 or 4, I could see maybe using it when trying to HQ high rank synths. As it is, it simply isn't worth it.

Also, please please please don't complain about being able to use 1-2 mats to skill efficiently basically all the way to 50. That's one of the big advantages ARM has. Cheap, easy to obtain materials and we always have optimal synths to grind on. It helps balance the massive sub craft requirements. No other craft has it so easy.