Talk:Akashi's Improvement Arsenal/@comment-217.10.52.10-20161115100559/@comment-28112544-20161115231740

T91 AP and ASW gears are cheap to improve up to 6-stars, so you can start from there.

You can also consider low tier fighters for conversion quests (eg Zero T21 for F22).

Not sure what your definition of "cheap" is but guns costs more.