josec's got the idea... idk about experiements though cause i always found them crowded before. i think aviansies are 30k an hour, while yaks are 50k per hour using bronze knives :)
I'd reccomend either ogres (King Lathas Combat Training Ground) or Yaks on Neitiznot, both require no banking if you take enough ammo. I have 99 range btw =P
I personally found yaks very annoying, mostly because of the amount of people training there, any more than 3-4 people and its too much to train there =P Can be difficuly finding an empty world.