Hello. I’ve gone through your pet collection, and compared it against every strat on Xu-Fu. And it seems like you’re missing a few things each time.
The best strat for you, based on the pets you already have, with minimal additions to your collection is the forth one. You have Comet, and you have Zandalari Kneebiter. All you need is a Mechanical Cockroach. Those are purchased with the reward of the Gnomeregan Dungeon, but they are also cagable, so chances are you’ll find one for a nominal fee at the AH. That dungeon’s been out a while, so the time for paying exorbitant fees for the Mechanical Cockroach are done.
Full disclosure, I’ve never tried this particular strat (I use the first one), but it’s rated 4.3, so it’s safe to say it’s reliable.
As an aside, I have to say, what frustrates me about looking at your collection is that there’s a huge amount of basic pets, easy to get, that you’re missing. Perhaps you’re under the impression that these pets aren’t valuable. But you’d be mistaken.
For instance, I see no snails. Against Elemental bosses, snails rock. I see no Emperor Crab, which is a must have. With its ability to heal and shield itself, it can take down a lot of things. It might take forever, but it gets the job done. If you don’t have the pets in a strat, chances are pretty good that a three P/P Emperor Crab lineup will get it done for you.
I see no rabbits, except the Darkmoon variety. Rabbits are also good pets to have. With their ability to dodge and burrow, they can be annoying as all get out for your opponent.
Your collection is small, but you’ve got some great pets. You just need to build. I get that it takes a while, but on the other hand, you’ve got the stuff to do some WQ, to get the leveling stones and the Polished Pet Charms to buy more leveling stones. So, git 'er done.
And most of these pets that you catch in the wild will be pretty much levelled up anyway.
If you don’t want to buy Snort, you can win him in the Celestial Tournament. There are four pets to buy, and you win one coin at the end of each successful tournament. Each pet costs three coins. However, with your first win, you are awarded three celestial coins, so you can buy your first one with your first win.
Addendum: I just now attempted that strategy, and it worked like a charm . . . once I did it right. I bungled it the first time, because (I haven’t played in a while) I mixed up Bloodfang and Hunting Party on the Zandalari Kneebiter. Consequently, the pet I was fighting didn’t die and the Zanadalari wasn’t healed. Fortunately, I have back ups, was able to attempt it again, and it worked fine.