[amsat-bb] JO90, JN99, KO00, JN09 Wanted Grids Question

I will be traveling in December and January and might have the opportunity to activate: JO90, JN99, KO00, JN09 on FM sats.

I'd like to ask European grid hunters some questions that would help me make my decision:

Are these grids considered "wanted" by European grid hunters? If so, what would be the ranking, most to least wanted? Is there a need for an activation (what is the last time they have been activated)?

I'm also checking if I could activate 50N, 20E covering all four in one QSO or perhaps operate on the line between 2 grids.

All inputs are greatly appreciated.

73, Jarek, KB9IIZ