In parties, your experience rate is determined by three factors:
Your racial experience rate, your level, and slayer status. An example of
how racial experience rates effect how much experience you earn in parties
is of an elf and a changeling of equal level partying together and earning
experience together. However, because the changeling has a higher
experience rate than the elf, he or she will be ending up with just a
little more experience than the elf.

An example of how level affects experience rates in parties is of two
changelings partying together. However, one changeling is a higher level
than the other. The higher-leveled changeling will be getting more
experience out of this.

Finally, an example of how slayer status can affect how much experience
you get while in parties is a dhampir of equal level with the changeling in
an area where the changeling has a slayer status. While the changeling
should be getting more experience than the dhampir, the changeling's slayer
status affects his experience rate. In other words, the dhampir will be the
one earning more experience than the changeling.