I don't think AV avalugg is that viable. Also your spreads are a little clunky (i would go for 0 hp so you get a rocks number)... Anyway, there are way better offensive assault vest users out there which actually happen to threaten most of the above pokemon mentioned (see: Azumarill) while still having better speed, attack and special defense. Avalugg's typing doesn't do it any favours either; ice is very bad defensively. You'll also notice that on all of those calcs, the AV doesn't reduce enything relevant to a 2hko, most are 50%+ which on top of having a rocks weakness makes this thing pretty bad. Also you'll see that because of the fact that you invested nothing in defense, he doesn't enjoy taking hits physically. I'd say thing thing is much better as a straight physical wall than a cheap AV mon. It has a better wall movepool anyway and can switch in on a few mons with ease (albeit not much), and has access to recover, roar, toxic, all the good things it doesn't have when AV. Look for some more viable users, there are lots that fill better niches than this thing. This thing's niche just isn't relevant and it outclassed heavily by a lot of other pokemon that don't have bad spdef or a bad typing. This thing is just too slow and in conjunction with one of the worst defensive typings, it can be revenged so easily it's disgusting. Even with assault vest. If you were ever to use this, a fully invested physical wall could have potential, but not much that other pokemon can do better. Even as a spinner, it's slow and is weak to every form of hazards. As a physical wall: Skarmory does it better. As an assault vest user: Azumarill does it better. This doesn't mean that it still doesn't have niches over them, but the cons outway the pros by a lot when it comes to him.
tl:dr: Azumarill > AV avalugg. As far as your set set goes, avalugg just isn't viable as an AV user and has almost no (relevant) niches over azumarill.
