Run laws or snape grass. For snape grass just start fremmy trials (no reqs needed) and use peer the seer to bank. Drop cash when using peer the seer to bank so you can keep going to waterbirth and repeat. Should get you 500+ grass/hr. both methods are 100k+/hr with no reqs
Thanks for the vid but people have already posted vids here about this. Also this method gets bad very quickly unless you have a way of lowering your agility level