in case someone wants to use newest pets for pvp... i did pretty well with this combo:
Moon Moon (PP) 1-2-1
I've heard about the good performance of the combination of Xu-Fu and Moon, but wasn't sure about the third pet at first. Most importantly, it has to be strong against mechanicals, and chi chi has a very suitable attack against them. The 1-3 hit attack is ideal because it continues after the mechanical resurrects and few mechanicals use shields with fixed reduction. Also, I wanted something feign death like, since there's already enough pet switching between Moon and Xu AND it blocks an attack. On top of it, it offers a pretty potent HoT to the active pet.
I chose a PP Moon because that's what I got from the boss...
I can imagine that a SS alternative might be pretty good as well because of the Crouch ability. However as long as I don't have access to an SS Moon my PP one will do just fine, after all it utterly destroys flying pets in few hits. SS might be desirable in situations where I open witn Moon (which I usually do) against a mechanical, to get off the tears.
As of Xu-Fu, I wasn't sure at first whether I should take Moonfire or Feed, but in the end, Moonlight weather isn't that important that missing it would break the game and Feed works really well with prowl and the beast racial, so I picked feed. I once obliterated a mechanical opponent using the Prowl->Feed combination (finishing it off with spirit claws after resurrect) thanks to superior speed and crit luck.
All in all, this team is pretty balanced and has good synergies overall between Moonlight, self-heals, burst and defense. It is lacking a second weather caster that would make the team stronger, but it is not crucial for a win. Facing e.g. a Darkness team is probably pretty tough, I imagine it to be this team's greatest weakness. However I never faced one yet so I can't tell for sure.
as of another suggestion for a solid easy-to-get team... it is still a strong team that isn't built around special synergies or strategy other than picking the best pet in that situation:
Anubisath Idol 1-1-1
Gilnean Raven (SS) 2-2-1
Fel Flame (HP) 2-2-1
All you do is basically hard-counter what you can, using weather effects to negate the enemy and mess up your enemy's plans by chanigng wheather and blocking stuff. All of it while doing extraordinary amounts of damage (Darkness/Nocturnal Strike and Burn/Conflagrate), of course. You don't care much about being force swapped or swaps due to dangerous debuff combos.