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

[Jarek Stopczyk, KB9IIZ]

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