Easy question tough answer. From the simple essence bot to the huge requirement bots there is no "easy" way to goldfarm, you just need to devise a plan based on making gold for profit rather than play. What would YOU do for gold on runescape if you wanted that partyhat? Find a way to use that and your good to go.
I started by using 10 bucks to rent a VPS for a month, so that's a suggestion. Also invest in paid scripts as you want flawless gp/hr rather babysitting anything.
Edit: Also WRONG Section bud, this should go in RunEscape Cheating section.