Go to BRM, just outside UBRS, have a level 60 friend with you (you are the low level character). You should be a melee character.
Anyway, your 60 friend pulls one of the orcs near the UBRS entrance and kills it down to 1% HP then the 60 zones into UBRS, after he zones in, the lowbie kills the mob and gets like 3k-4k exp per kill.
Have fun!