Hunts are exactly that. A HUNT.

Early pulling is some kind of cultural thing we placed on a hunt. People have made arbitrary decisions on how long hunts should be up and rules vary from server to server. Some may have longer wait times, others have shorter windows.

What probably should be the most simple solution is shortening the length on spawns. IE A ranks in ARR decrease it from once an hour to every 30 mins, or leave as is (I don't think ARR A ranks have a problem) but have S ranks spawn once a day in ARR zones. S Ranks in ARR are meant for 50 players, not level 70.