Active means I'm playing that gamemode daily or almost daily.
Semi-active means I'm playing it sometimes, around once a week.
Inactive means I haven't played that gamemode in a week or few and it's not my current focus.
The priority calculation is a way to see how much grind is required to reach my goal in that gamemode compared to other gamemodes. It counts progress to SS goal (X/10,000 or X/20,000 in std) and progress to top 1,000 ranked score. The rank itself isn't used but the amount of score required. For example, in mania going from top 10,000 ranked score to top 1,000 you need 2.53x your starting ranked score, but in taiko it would be 10.01x, which makes it a lot more grindy.

I won't always be playing the gamemode that is on top of the list. I'm focusing on ctb since it's the most fun gamemode at the moment.

I'm not trying to keep up with completion, or even think about full completion for the time being, though I have done that in the past and might return to it someday.

Instead, what I usually do is pick one year to focus on, or sr range or length sorting etc.
I have an osu collection ingame for each year and for all of them the idea is the same.
FC map -> remove it from the collection.
At the start there are thousands of maps in the collection. I usually start by dividing it into smaller goals, most often by month or star rating. Then as the map count starts going down, the maps left in the collection start to become more challenging. When I'm at a point I have submitted scores on all of the maps the collection should only have these "challenging" maps left. That's when I move on to next year and after a while I revisit maps in the old collection.
I also have a FC Rate target I'm trying to keep on each year I complete:
<5* 100% FC
5-6* 95% FC
6-7* 50% FC
>7* A rank or better

I only count scores with no difficulty reducing mods for FCs, so no diffadj, relax, random allowed. For maps I can't FC I try to at least get an A rank.

Goals:
10,000 SS
Top 1000 Ranked Score

I'm mostly playing specifics at the moment. Started from 2.00* and going up from there, trying to SS as many maps as I can. When I hit a wall I will switch over to converts for SS farming until I reach 10,000 SS. I'm thinking of doing ctb specifics completion too, but I want to avoid D ranks or having to use NF, so I don't know what's going to happen until I get to the higher sr maps.

But the main idea is to grind until 10,000SS -> specifics completion? -> switch over to Scorefarming

I think gaining SS in this gamemode is easier than the other gamemodes, so it's not like I will stop farming after 10,000SS, but the progress will be much slower after I switch to scorefarming/long maps.

Taiko is an interesting one. I think it's the slowest gamemode for ss farming as I still leave out dt on most maps I play. I have mostly been playing converts until now, but I might start clearing specifics instead because there's plenty of them even on low sr. The lazer scoring in this gamemode is confusing. Even when it says that cl has 1.00x multiplier dt lazer ss still overtakes dthr stable ss in score and I have no idea why.

Every map is worth same score so scorefarming is just spamming those short and easy maps which also works for ss farming. Mania is probably the hardest gamemode for me, mainly because I suck at longnotes and the timing whem letting go of those.

I don't play mania specifics much. Ideally, I want to reach as high as possible score ranking with converts and after that start to do specifics completion and get even more score. It's very likely the last gamemode I try to complete other than standard.