A successful pvp pet team should not base on the pet category to build around as to support each other, this kind of thinking will only put you in a very bad and very defensive position and in most of the case, you will fail.
A successful pvp pet team should always base on skill to build around it.
What are the most powerful skills?
- Huant - so you build around it such as combine with teammates with dodge/avoidance to give more rounds or use a stitch to howl to double the result.
- inspiration - so you team up with a bone raptor to use massive aoe attack.
- immo/gate - so you team up a valk and a scourge whelp with the imp, use huant, get your imp in, gate your opponent to the back row, switch the whelp in, put the leech HP buff on your opponent, which also helping the imp to use immo to get more HP at the back.
other example also including the bleeding team, lightning team, ect.
This way you will have a much higher chance to beat more random teams.