Experience Point Earned

Maybe give the creature a limited amount of givable exp.  Lets say a group of new players goes and attacks a blue dragon (can't think of a healing creature right off hand) and each person dies one a at a time.  Still, while they are all attacking they are all taking from the creatures exp "pool" with percentages respecting percent of hp taken from Max limit of their hp; but only giving out a certain amount exp until maybe it's health regenerates fully or respawns.  Either way it would take about the same amount of time for the exp gain to fully regenerate from the level at which someone trying to infite lvl off of the same creature.  So, who would care if the person was trying to infinite level off of the creature because it takes the same amount of time.  This could also be translated as sparring or actual real life training.

Not really.  The dragon is going to x number of seconds to get back up to that amount.  Why not (as mentioned in my last post) implement a timer to regenerate exp?  Maybe an all at once shot like casting gheal fully restores (some) people health bar, or gradualy like con increases hp over time.

I never thought of that either....actually I think I really like that.....except someone with like 5mill exp could keep going to that creature and let the creature kill them.  Then, take a lower lvl char and power lvl off that creature by gaining 5mill exp + Creature exp.

I think a system of getting XP from hitting a monster might work if you only got the XP after the monster died and the monster had to die within a certain time period of you attacking it.

Go kill stuff like everyone else?

I mean, back in the old days when it was hard to level I had a mage that I leveled just fine by killing monsters.