Also what he is pointing out is about lessening your skills primarily because, as you have said yourself, you only use some skills sometimes and maybe even not at all
At most you may want to have lv5 Downfall for better bossing ability for its attribute despite it being bugged
A good, ideal skill rotation is when you can master rotating all your skills when their CD’s are back. It is true that having 1 pointer fillers to have more skills to spam is the best way to squeeze more dps theoretically, but what’s the point of it if you can’t rotate your skills and it ends up being a “dead skill” on your hotkey?
Oh and Barrage is actually OP if done right