koenraku

Alright guys, my first post on here so anyway my name is rob and i've always used this site for quest guides and stuff since like 2006. anyway i am planning on getting 77-99 hunter as i haven't hunted in ages. i have been told to do grenwalls as they make the most profit too, has anyone actually done these 77-99? how much does it make? if theres a better way can you tell me the requirements and profit ill make and stuff? thanks :')