Gliscor is actually a 5% encounter from the rustling grass spots, so you needn't collect BP to evolve it at all. Acrobatics always outdamages Ice Fang (I also tutored this and regretted it) unless you're dealing with a dragon that's 4x weak to ice, which only applies to one of Drayden's Pokemon (two on CM but you said you don't want to discuss that) so that's your primary way of dealing damage. I didn't find myself using Dig at all (probably because a fighting-type covers some of the same mons with it) but I did, incidentally, keep X-Scissor on it, so that I could enjoy healing from Leftovers while attacking Grimsley and Caitlin.
Still think it's Mid, but I haven't got much to compare it to, since we haven't agreed how we're tiering Lapras, Starmie, etc.
I want to discuss Zorua, is it really good enough for High Tier? I ended up dropping mine because it was quite a disappointment.