User blog comment:KptRudobrody/Akashi guide for everyone/@comment-26337865-20150916145200/@comment-26459119-20150916153249

Well to your first statement: I think, that improving 12.7(B) is not so much worth at all. I think, that big guns which have better ★ scaling are more impotrant. Also geting upgraded guns (for example 10 + AAFD) is more important than improving 12.7(B). From my expirience geting 2 x 10+AAFD will be enught for almost every sortie you will make - as DD will usually be either AA-CI DD or torpedo CI DD.You have a point if you consider that type B only have 1 FP advantage, but for me, it is +1 FP, which can sometimes leave enemy flagship with 0 hp instead of 1 hp. And You will lose screws, but 10 screws in 3 week time is not so much for me. And well you can run out of 10 + AAFD to improve since 91 are not very good source to start geting more of them, and even if you would like to farm Maya/Fubuki it would be still very screws consuming.

For medium guns: I think that improving better ones (no. 3) will wield better results, as you will eventualy get your hands on more of no. 3. I can see your point of view, but for me, Akashi's Improvement Arsenal is something, that will give my best guns even more power. I do not see necessity of improving weaker version if I have a supply/rather easy possibility of geting more needed eq I need to improve. I did not know that (20.3, 20.3 no.3) bonus does apply only once. If it works that way, improving no.2 is worth (-1 FP for +1 ACC).

If there is other formula would you like to share it with me? I would like to include it for sake of more data in one place.

About torpedoes - I don't know which one is true, I think that I may have asumed something that I shouldn't. I have not seen any kind of research about torpedoes on any english article i have read.