Tiny Twister I think has to be H/S or something. My P/B cannot get slicing wind in before it dies and I'm ending the fight with him getting a cast off on my Ominous Flame, always critting for 6-800+. To get this to work, I subbed in my Zeph Prince, which has the same moveset but is P/S build.
For the last swap, instead of the Prince, Ominous Flame got subbed back in, I used 2 Spirit Bolts (and then he was killed). Then Prince comes in and I Thunderbolt. He gets a gate off but it doesn't kill Prince. Tried an extra time and it seems to work.
I tried this strategy 5 or 6 times, and Snozz hit my Ominous Flame three times every battle, leaving him at 560. Tried to complete the battles anyway, but always came up just a little short. Where Crazy Carrot is supposed to Pass, I tried using Jab a couple of times. No difference. I then read the tip from Tranmere Fan, posted below, about using Acid Rain instead of the Pass. I tried that and Flame only got hit twice and lived long enough to win the battle. Now, this may be entirely a coincidence between my use of Rain and the fewer hits or it may not. The only way to make any really definitive determination would be to do an insane number of battles testing it with and without Acid Rain. For myself, I'm well satisfied with finally having won, and I am not interested in more Elemental vs. Snozz battles, thank you very much. Thanks for the strategy, sis4dark; for the tip, Tranmere Fan; and, as always, for the great website, XuFu.
Still either RNG or breed-dependent. Same situation with the 560 but I tried eleven times; the HP and actual hits are identical each time. Flame dies in the last round while killing Snozz. No variation at all. The Acid Rain does it get that far but I can't change the outcome.
I tried several strategies using pets that I had and none of them worked. I tried for ages to get an Ominous Flame when MOP was current without luck. If I couldn't get one when I was playing on timeless isle every day then I wasn't going to bother now. Eventually I caved and shelled out tens of thousands of gold for an Ominous Flame and levelled it. That worked.
I think it's absolutely ludicrous that a pet needed for a meta achievement can only be beaten using pets that are either hard to get and/or expensive to get. Even moreso when several of the pet families for Snozz can only be beaten with rare/expensive pets. Stupid call on Blizzard's part.
It's why I buy pets off AH when they're a rare drop during the expansion they belong to. Generally there's a lot of them at that time, and they aren't quite as expensive as later expacs. Apart from which people are taking advantage at present because of the need of these pets.
Worked second time (had to restart due to OF's health issues), but then Ominous Flame didn't even get to cast Scorched Earth as the closing move. Forced in, but a turn later than expected, and then DoT did its job.