Technically any pet with Rampage works but I've had the best success with Wolpertinger being a Critter. It's always survived vs Scales.
I tested in multiple fights with a P/P Bronze Whelpling and it never failed, though usually with only 76 health left. Maybe I was never crit but it was tested in at least 10 fights.
I did test a S/S as well but it won for different reasons. I had to do one more Arcane Slash at end. I don't know if anomaly.
At least one of the pets for this strategy require the use of a specific breed.
You can use this strategy to carry a level 1 level pet to give it experience.
The strategy offers a TD script that can be used with the TD Script addon. You can copy the script by clicking on the button to the left of the pets.