Just realised you registered and this was your first post just to tell me my strat didnt work? Am I getting trolled?
I think you're being a bit overly defensive.
The person just didn't manage to get it work. Maybe she/he got unlucky with enemy crits (edit: or just missed some part of the strategy). That's one thing that maybe can screw this up? I'm not sure, I'm being a bit lucky today, I've done it maybe 20 times now with different teams and have seen maybe one crit (which did screw up my strat for that team though).
I played around with a Snarly/Sitched Pup combo and a bonestorm-duo and thought that there must be an easy way to carry pets. It appears the answer was Pandaren Water Spirit
I wrote your strategy down to my Rematch notes using the formatting I'm used to:
Start with Pandaren Water Spirit
3. Water jet until Rockbiter is dead
Stonechewer comes out
6. Water jet until Pandaren Water Spirit dies
Choose carry pet then IMMEDIATELY
Switch to Stitched Pup
8. Diseased Bite 1-2x until Stonechewer dies.
Acidtooth comes out
11. Consume Corpse
13. Diseased Bite until Acidtooth dies.
The numbering don't reflect turns, but rather checkpoints.Edit.
Right now I got a try when Stonechewer's ability (Body Slam or Punch) crit my Stitched Pup and since it's slower than Stonechewer, it died to the next hit resulting in only being able to do Diseased Bite once against Acidtooth on its undead round.
Another source of variance might come from how many rounds PWS survives against Stonechewer. That coupled with crits and Murphy's law guarantees that there's always someone who will hit the brick wall. Edit#5304.
Being lucky sometimes screws things up too. I killed Rockbiter so that Geyser had 1 round cooldown left when I faced Stonechewer. So I did Whirlpool -> Geyser -> Water Jet -> Carry Pet -> Stitched Pup. This resulted in Stonechewer being stunned without being rooted and the invisible tamer switching the stunned Stonechewer to Acidtooth.Edit#5305.
I think it all comes down to Stitched Pup vs. Stonechewer. Stonechewer's Body Slam crits for 726 and hits for 508. Punch does 338. Stitched Pup has 1546 hp. He usually does 2x Body Slam & 1x Punch to my Stitched Pup. So if you calculate without crits the damage my Pup takes is ~1354. Add one crit from Body Slam and it's ~1572. Simply can't afford Body Slam to crit.