The Hardest Skill Cape?

Albeit the cash making might be more fun to some people because they boss hunt or merch the money, some might not find it fun though if they are not a boss hunter and do something like rc or wcing for the cash. Unless they find those skills fun of course :p

I personally enjoy rc'ing

I would have to say the hardest skill is slayer. I have high melee stats and what not but I absolutely can't stand rs combat so it makes a skill like slayer a bitch to do =\