Ok so it rly depends on how fast you kill them .
Im doing this solo and got 345xp in around 50min.
I recommend vr5+, theese mobs are v10.
You get around 490xp per kill some ads only 22xp (Veteran points)
Keep in mind there are some people doing it, ask to join group or something then things gets a lot faster!
here is the location.
The mobs are all around the farm.