I think Spirit Wolves are the one that you can 5 of, right?
Well, those are useful vs a lot of things.
However I find Bear better vs. Barbarians and Bonemancers. Why? Fast re-casting. Vs. a Howl abusing BvC, if you use wolves, you will be recasting until you run out of mana or you die. Vs Bonemancer, it's better to have the summon re-casted in a instant, prevents you from taking heavy heavy damage.