I want 99

[Strife]

Hunter, is quite common but my favourite skill + 99 cape looks awsome

 

[rareepic]

mining

 

[Homefrydgangsta]

I'd say get an easy 99 first, like cooking or fletching.
Next, if you want something hard, and your filthy rich... get 99 con, 99 smithing, or 99 crafting.

If you are filthy rich, 99 prayer is boss.

 

[WebSite]

Thieving is not tough, and yet it is a rare cape

 

[Fr0zennZ]

I'd say slayer, agility, herblore or runecrafting.