There is one thing that makes crossworld Hunts complicated is the issue with being unable to teleport while you are in a party. I am guessing they focus on one world at a time before splitting up and moving to another world? I have seen at times where there were quite a few A rank hunts just sitting here on Balmung with not a single person even nearby them. XD The only thing about this whole set-up is that it doesn't help or work for the more casual people who don't focus the hunts but find them on the occasion and want to slay it but not able to get a group together for it cause "train".