The Macabre Marionette (2,1,1) absolutely destroys the first two pets on Shademaster Kiryn:
Round 1: Death and Decay
Round 2: Dead Man's Party
Round 3: Dead Man's Party
Round 4: Dead Man's Party
Round 5: Bone Bite (Nairn heals)
Round 6: Bone Bite (Nairn dies)
Round 7: Dead Man's Party (Storoem casts Lightning Storm, Macabre Marionette dies)
Round 8: Dead Man's Party (Storoem builds Turret, Macabre Marionette undead round)
At this point, Storoem has less than 300 HP usually. I follow up with Terrible turnip to cast Sunlight (cancels lightning storm) and Tidal Wave (kills turrets) until Storoem dies. Then I swap in my mechanical for Summer. This time around I used rascal bot, since his stun will totally cancel out any prowls (I also use the heal ability immediately after the first stun to get back to full health) and he can just whittle Summer down. Honestly, any mech you like will do here.
I haven't tried to optimize that yet, but it is a pretty solid strategy using the Marionette. I am curious to see how he does with Taran Zhu.