Note: All formulas apply if you are in a solo party and the creature is no more than 9 levels below you or 19 levels higher than you.

Given the base sxp/kill of a creature, SXP, the sxp/kill a creature will give you, sxp, is based on the level difference between the creature and your character, n.

If the creature is:

> your level
< your level
= your level

Example:
Let's say the creature is a Berserker (which is level 34) and you are level 31. The base sxp/kill is 1100 and the creature is higher level than you with a level difference is 3. So then:

sxp = 1100 ( 1 - 3/20 ) = 935


Given the sxp/kill a creature will give you, sxp, the base sxp/kill, SXP, is based on the level difference between the creature and your character, n.

> your level
< your level