Saying all that, there is a definite weakness here, which is special dark and ghost moves. But a good thing is that slowbro can take a knock off from some mons, and slack off the damage after twaving the opposing threat, and then knock off wont kill because it wont do enough damag...
The ability also meshes well with our typing - fighting + ground weakness is fairly physical-leaning - and the new typing allows us to more comfortably run items aside from HDB. Assault Vest & Rocky Helmet come to mind in particular. TL;DR: My suggestions for AT #...