Oramond West is characterised as a good experience, but only if the quaras are active. While it is true that the wikias indicate that it is random for this raid to occur, I have noticed a pattern on different servers I have been on.
Pacera: 30 min after the server save.
Solidera: on the save server, always.
Peloria: 1H after the server save and 12H before the server save.
Yovera: on server save, always.
Pulsera: 4H after server save.
I've seen it happen at these times 2 times per day, always, recently I've noticed it and I'd like to know if anyone else has. It would be helpful if you can look for a pattern on your server.
I don't know if they change on every server after a certain amount of time, but I couldn't let it go when I noticed it since I've been following this raid for a while.