Most expensive skill cape?

Depends on how you are training, the two most expensive would be prayer and construction. If you want quick xp, construction will be the most expensive.

 

Herblore by far, you still lose upwards of 100m+ If you do even a half decent method (i.e. prayer potions, sara brews, etc.)

 

Slayer with recoils?

 

Summoning and construction and herblore are insane. Probably construction..
You'll be pumpin the mills in to that one..

 

id say prayer then herb then con.

 

It's either construction, herbelore or runecrafting they all cost alot.

 

Hehe, most of you are wrong, Construction, Smithing, and Summoning (If done right) Can all come out to ~50m.

Herblore, at the cheapest, is around 90-110m.

Easily the most.

 

you make money on RC