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

I disagree with the what to upgrade/improve section for light guns. The 12.7cm gun is worth improving because it costs 0 screws to improve to +10 if you improve daily, regardless of failure. Imo, the 12.7cm model B kai 2 is not worth improving since it costs at least 10 screws if you improve daily, and you need 4 12.7cm model B kai 2 for improvement fodder. The effort is not worth the 1 extra firepower over the regular 12.7cm. If you have that many screws to spare, you're better off improving the 10cm + AAFD gun.

For medium guns, the regular 20.3cm gun is worth improving. The 20.3cm gun and the 20.3cm no.3 have a 10% night battle accuracy bonus for CA, but the 20.3cm no.2 gun doesn't. Even though the 20.3cm no.3 is superior to the regular 20.3cm gun,  you need 4 of the 20.3cm no.3 as fodder to improve to +10, which is not easy to get since Kinugasa only gives one at level 55. Mikuma gives a gun at level 30 but she's really hard to get. The regular 20.3cm gun is easy to improve to +10 in comparison. If you compare a 20.3cm (+10), and a 20.3cm no.3 (+6), the 20.3cm (+10) has 1 less firepower and 2 more accuracy.

The 20.3cm no.2 gun is also worth improving despite not having the night battle accuracy bonus for CA. This is because the bonus only applies once, so the 20.3cm no.2 can be used in conjuction with the regular 20.3cm and the 20.3cm no.3 gun. It's also easier to get the 20.3cm no.2 gun to +10 compared to the 20.3cm no.3 because Ashigara gives 3 guns at kai ni.

There's another thing I want to mention. The tables in the 'Effects of improving' section only apply during day time. Night battle follows a different formula.

I also have a question. I've read that improvements on torpedoes don't give accuracy, whereas you stated it does. Do you know which one is true?