What if HP could be raised another way? Not exp related? imagine an ultra rare armour drop, that add +10 to current hp? or a master quest where the reward is a fountain that when you drink from it adds +25 to your current hp, even over your maximum. I dont think hp should be raised over 99 by using exp, people have already pointed out that some players would have massive advantages straight away, but we can think outside the box, what about some special camo armour that makes you harder to hit? or super rings of recoil that remove damage and send it back? I always had this idea of super rare items, that there can only ever be a certain number of, say 1000 super recoil rings each with a certain number of charges, once the charges are gone, the ring goes back into the "drop pool", only rings in the drop pool can be dropped by the high level monster that drops them, if 1000 have already been dropped, no more can be dropped until once has been used, we would need to look at how you would stop people hoarding them, but it think it could work.