I think Behemoth is a tricky one since, doesn't it actually show up on the map, unlike Odin/Coeurl/Foxy? Maybe I'm remembering wrong from years ago when I caught it, but I thought I remembered mousing over all the FATEs on the map and doing a double-take when I realized I skimmed over Behemoth.

Since (I believe) it can be spotted on the map by anyone in the zone, would make it easy to even accidentally get called out.

Also doesn't help not getting synced down at this point. Fight's over in a snap. And I remember that from long before I ever hit 70 even.