besides runemining, RC is yea, prolly the most profitable skill in f2p. as to what runes to craft, airs are surely the best, cause they got the shortest route and best at multiple runes. tho, its hard to sell em these days - selling airs takes more time than crafting. waters are prolly easy to sell, tho they take time to craft; fires give the same exp per hour that airs, tho for selling they are not very wise choice. bodys and earths - u can craft em for ur own fun. minds are good when u want to use crafted runes for lvling in magic, the time u take for crafting them isnt really worth the money u get from selling them.