A lot of the time it's more efficient to stay at a zone which you are above the level range for simply due to the fact that you can defeat enemies much faster, in turn gaining XP faster than if you were fighting things closer to your level. There should be an exponential XP decay based on how many levels you are above the target.
A lot of the time it's more efficient to stay at a zone which you are above the level range for simply due to the fact that you can defeat enemies much faster, in turn gaining XP faster than if you were fighting things closer to your level. There should be an exponential XP decay based on how many levels you are above the target.