Again, just build the spec as though there is no pet. Then let people summon the pet for a DPS loss and no additional utility.
Oh no! A weird suboptimal choice that is extremely important to Subgroup A might be marginally better at the content that Subgroup A participates in at a vastly higher rate than any other content in the game, while having zero appreciable impact on balance outside that one isolated context! However will we resolve this conundrum?