"Custom Point" is what it says literally but is a little odd. Can't use the succinct "Stat Points" because it would shorten to SP, which is already in use for Special (but it would be the most intuitive translation). "Attribute Points" is a little longer but also fitting. As for カスタムゲージせってい, "Distribute AP" or another P abbreviation sounds nice.
For ぼうぐ, "gear" seems a little vague for things like shirts. I don't know the range of things that are being worn, if everything is more shirt-ish or if some seems like armor ...
Now this is just me being nitpicky, but when I think of an "accessory" in an RPG I think of something small that you wear for a stat boost. The accessories in this game are "badges" with pictures representing each stat. If that's all accessories are, I'd rather refer to them as AP Badges. Could also change the icons to make them look like badges someone might actually wear ... maybe use color coding. R/B/Y for AT/SP/AG, secondary colors for combinations. Dunno how much we want to change any graphics though ...
Need to actually play through the game more to add to context. Gonna have to be away this weekend though, so, I'll get back when I can...