As I am aiming for 65 slayer at the moment, I want to be able to camp at Dust Devils using Bones to Peaches. Assuming I am starting from 0 points, how many of each rune will I need to earn enough points for the spell? Thanks.

I did it a couple days ago and you need about:

 

 

 

 

 

 

 

1 nat for every graveyard points (+ 2 waters and/or earth runes per point) - 200 points, 200 nats

 

 

 

3 nats for every alchemy point - 300 points, 900 nats

 

 

 

3 laws for every telekenetic point - 200 points, 600 laws

 

 

 

 

 

 

 

And for the enchant arena, it's pretty hard to say. You'll use roughly 1 cosmic for every 2 points there if you do it "the normal" way. But when you go at non-peak times, when there are very little players online you can just world hop and only alch the dragonstones (this will even be faster). But you'll get 8 points for every cosmic (when using diamond enchant).