Roach baneling drops?
Try the new ZvZ style you made a guide about but in this matchup! Defend with infestor spine until ultra then uber push!
I also read a guide or something once about Ultralisk baneling deathball. I tried it a few times and its actually quite lol-worthy. However, I was in a lower league at the time (probably around low diamond at the time) so I don't know how well it translates into high masters. But the idea is that ultras break the forcefields, the only thing keeping banelings from giving toss armies big splashy hugs.