I'd go Super Sons > New Super-Man > Action > Superman
I have dropped both Supergirl and Superwoman. They were fine, just not enough hours in the day so I had to make some cuts. Superman was great up until a few months ago but it has really fallen off a cliff for me, I hope Tomasi and Gleason get back on track with the next arc.
I'd mostly agree with this. The first ~12 issues of Superman were awesome but it's been simply okay since. And the road trip two-parter is one of the absolute worst things DC has put out since Rebirth, I swear.
Action is never amazing but it's been solid ever since they got past the Doomsday stuff. Lots of heroic Lex Luthor and focus on the supporting cast in general. The recent Revenge Squad arc was top notch.
I was actually surprised by how much I liked Superwoman when I picked up the first volume recently. Super weird series, and kind of a JaneThor knockoff in a lot of ways, but Lana makes for a cool lead.