List of Creatures by Experience to Hit Points Ratio

An important factor to consider when hunting to gain levels, more so for a druid or sorcerer (when hunting creatures that he can only kill with runes), is the ratio of Experience points earned by killing a creature to the amount of damage he has to inflict on the creature to kill it (hit points).

There are, of course, other factors to consider, such as self-healing creatures, and creatures that are likely to do so much damage that the player must frequently heal himself, and the amount/quality of loot dropped by the creatures, that determine which ones, in reality, are most economical to hunt.