I heard if you put it in the pocket slot ashes are destroyed and it uses up charges without giving you any prayer xp lol. On the other hand, if you have it in the inventory you get normal xp from ashes (not double as you should) but it also doesn't use up charges.
I made one and I've been using it at abyssal and black demons. It's really nice for anything that drops ashes lol, you can save like 20+ inventory space at the tasks I mentioned by not having to carry prayer potions and infernal urns. I can now actually use a titan so yeah.
But I think it will start using up charges in one of the next updates and I don't know if I want to pay 200k a task to keep it charged. As long as it keeps its ash function at 0 charges (without the double xp) it's going to be good though.
Hi
20-Oct-2014 04:11:58