With a bald head, green shirt, brown pats, and all. I basically rock the generic bot look a few years back. Except I occasionally will dress lavishing with a santa, red ele, and desert boots, no necklace, bracelet/ring, or cape either just because.
I'm a skiller on Runescape my self! I came up with my outfit by looking at other skillers on youtube and taking bits and peaces of that to make my own ^_^ Hope this helps you out. =p
Just a fury and a trimmed cape with matching coloured boots and gloves. Then change your top/bottoms colour to something very plain and simple and matching or completely contrasting colours! simple, but incredibly good looking.
If you're lucky enough to have a trim colour to match a h'ween/santa then use one of those as your headpeace