Since Halloween only comes about once a year, people forget all-too-easily how ridiculously time-consuming gearing out teams with pets is.
Unless you are in some guild instance with 2 or 3 other guildies spam-killing its going to be a slow go... And if your guildies don't already have their own pets, it's going to be an extremely slow go.
There is always the dice roll of waiting for Raygan to /auc MOF pets for GSOAs for a day or two before everyone realizes the actual human beings are simply giving away their rots.
Long story short : buddy up with someone who doesn't need many pets. Your lower level will turn his yellow cons white, and, in the spirit of Hunter's vision: provide an experience beneficial to both the vet and the rookie!