Didn't have a leveled toenibbler, used a baby zandalari raptor with 1,1,1. In the 3rd slot, he only has black claw, but I didn't need him. The first 2 did all 3 enemy pets. He sure looked cute sitting in that slot though.
I used a fox with dazzling dance/howl/bite in the first slot as I only had anklerender and kneebiter levelled. Howl on cooldown, dazzling dance while blinded and bite finished off Atherton and Bybee leaving my third pet unused.
P/B Anklerender, so Atherton went first. Blind on turn 1, burrow turn 2, so Black Claw not applied until turn 3. Still finished him with Hunting Party and didn't need leap. So, like other fights against this group, speed isn't important but it's preferable.
Strat is solid, just be able to adjust on the fly based on your breed and Atherton's randomness and you should get through easy.
When I did most of these strats, Atherton wasn't using Blinding Poison, (which I'm assuming they adjusted with this patch), so I apologize. When I finish up in Gnomer, I'll be heading over to Night Horrors to see what I need to adjust on all these fights. :)
it's random, been doing full families vs these guys and it's completely random what order the enemies use abilities, so not every strat works perfectly, needs a priority instead of by turn list. can still make most of the fights work even with the top strats.