glad everyone hates the mining skill, i hate it too. ive gotten it to 85 though, and i make 6mil a day without much effort. most useless skill would have to be firemaking as usual. most hardest to train would be mining. agility would be 2nd hardest. farming is easy. rc is no where on the hardest to train list. slayer is pretty hard too but you always make money when training it. same with rc, no one ever buys dueling rings to train it so they rate it from running nats at the abyss even though they make money and say its a slow skill. overall, the absolute worst skill is firemaking, no profit, no purpose, no use. only besides for one or two quests, but even i havnt done those quests and i still have fun. every skill is needed for a quest now though, so the same applys to if you hate any other skill and say its the worst. the winner is firemaking