Well I got 93 back in November before I went away (you might remember) and used dbones for that because they were only about 4k each then and ashes weren't out. For 93-95 I used ashes along with a few dbones I had banked from slayer, it cost me about 13m. Because you're really good at grinding I'd suggest ashes because they're cheaper, or maybe even baby dbones if you wanna work out how much that'd save you. :P