The way hunts were intended originally was to be an optional soloable experience with varying difficulties. B marks were meant to be soloable by an i90 player, A marks meant for a party of 4, and S marks meant to be an 8 man raid. At no point was it ever meant to be server wide content. So raising the hp was catering to the masses of whiners. These were never meant to be Odin scale fights. The mistake square enix made was ever including those damnable books in the reward system. Not only have they broken any kind of balance in the item level scene, they have pretty much condemned hunts to be a Zerg fest because of it. Why run coil, when you can farm hunts all night and hit i110 in less than a week? So the first fix I can see is removing those books.