What bugs me about that FATE is the fact that it's on Azys Lla. That map is huge, and honestly I don't see many people having business there unless it's for unlocking content. At least at the Shroud you keep seeing a lot of people, same for Coerthas, and those maps are not gigantic so you still have some time to participate on FATES if someone calls it out but you're on a different map.

That being said I've only ever saw that Ultima FATE one single time. sadly. I also want those horns but everytime the FATE spawns I'm either inside of a duty or not playing the game at all, which sucks.