i know this post is a couple months old but i cant help but wonder how you really expect to heal with a beast with that combo long term? shoot post 50. my beasts best heal at 51 is greater heal i believe. ya, when mobs are slowed it gets easier but unless you stick to old world mobs i see your beast going oom. agaisnt mobs in dranik scar, planes where the mobs dmg output and ac are much higher i see there being a problem, and dont get an add.
shammy is fine wit that combo cause you can reasonably expect your shaman to drop dots to help with the dps issue. shaman and sk pets arent great but better then nothing. i would make a cleric or druid with the sk before a beast because at higher lvls, slows or not, you will need to be healed and a beast isnt gonna cut it.