Giving this a go with a Ghostly Skull

Giving this a go with a Ghostly Skull, a Spawn of G'nathus, and Legs. Rational behind the choices is that they're all packing some decently hard hitting finishing moves... and I don't have a lot of rare pets that low!
po wow
It didn't work the first time, but the 2nd attempt went better - the Foe Reaper's Demolish was not on his side, and I didn't get nailed too hard. The Ghostly Skull was able to Shadow Slash him to death with only one miss and still be alive for Clucks, who he pretty much mangled! Ghostly skull on the undead turn left him with literally one health after the few slashes I did. Sushi the Spawn of G'nathus finished him off.

Teensy wasn't kind to Sushi, though, doing a lot more damage than I would've anticipated. I got a dive off and he burned Survival on it, at least, which was important...

because it meant it was on cooldown still when Legs got him low enough to finish with Surge of Power >;3