Brewpup is not terribly useful. I have all of the storepets and I dont find that one to be very good.Pandaren Monk
is also useful in battles when facing dragons, but being really noisy. A -VERY- vocal pet! I had to mute its soundfiles to be able to tolerate using it. Imho a Bonkers
from timeless isle will serve you just as well for a strong humanoid pet, especially if getting a speedy breed to really milk his abilities. Dodge and tornado punch in particular.
I advice Blossoming Ancient if you must choose a strong and unique pet. You will LOVE its sheer staying power once it gets going! Lil Raggy is just a dps pet, a blunt instrument like so many others.