You will need Fletching skills level of 70 and RS gold yew logs (Woodcutting proficiency level 60) to cut the longbow of yew (u) into them, and then bowstring (Crafting skills level 10.) used to strangle the bow. Cutting the bow as well as stringing it give Fletching experiences.
Skill Herblore up to 25 in order clear Grimy Ranarr Weed The herb is found in Level 13 in Combat Chaos Druids (which is a great cross gold making opportunity since Chaos Druids can be harvested to make valuable items) and keep doing so until you are at level 30 in Herblore skill. At that point, you'll be able to create unfinished Ranarr potions. And then, as always, put it on Grand Exchange and hope for huge gains.
Although smelting bars is tightly coupled with Mining, it doesn't mean you don't need to mine ore for yourself - requirements for efficient smelting bar will not stop many people from doing it and it's a good idea to purchase a large amount of osrs infernal cape raw materials from the Grand Exchange, smelt it and then ship it to the market as a refined item.