You're not wrong...
Being a FS Priest is just awful. There's no parties, the only way I am leveling is 'cause my guild leeches me and as much as I appreciate their help getting me 99, I am so bored, I miss parties.
Though I would say finding a party outside of a guild or a group of friends can be difficult on the server, it's fairly easy to create your own parties for your guild and/or group of friends. This has been my strategy, at least, where I'll plan a CTHOs / Majos / Magma / Bios 2 party ahead of time and then post the date and time in my guild's (and others) Discord servers. Most of the time people will join, we'll have a good time, and I have the ability to level my FS. For example, yesterday we had a CTHOs party that lasted almost 8 hours because people kept it going. One person (playing Priest) was able to go from 66 - 81.
Another benefit of organizing your own parties is that you have greater say in (1) where you go, (2) what you do, and (3) what classes are 'accepted'. This is one of the ways I've been able to level my sage.
If you (or anyone) ever wants into one of these parties, feel free to contact me and I can keep you in the loop when we do it .
Anyway, just an aside!
My New Year's resolutions game-wise would be to get at least one character to 99 before trans comes out and I wanna try out WoE at some point .