Does anyone know if you can use stews to boost to 91 for double nats? If it's possible then I might just give the Karamja diary a shot.

 

If not, any other suggestions? I'd like to complete the diary, but not so much that I want to spend 4 months doing nothing but runecrafting.

I don't see why you couldn't. I've been able to stew for other elite tasks.

I didn't mean to ask if it will count for the task, I was wondering if it works at all. So basically my question is.... if I boost to the level will I get the double nats?

 

I'm only asking because the last time there was a runecrafting task involving the giant pouch, the boost didn't help.

Yes, bring a abyssal familiar or a friend with ess. Once you get a boost drop everything besides ess and fill up inventory with ess then craft.