Not sure what you're talking about. The Supercharge-buffed Wind-Up one shots Leonard, but he's an undead so he comes back to life immune one round. You use that round to get another Wind-Up prepared before he dies for good.
My HH starlette just falls short of one shotting Leonard, but a powerball next round kills him and can pick back up right afterwards with the strat. Edit: i mean HH doesn't get him into his undead round, left with 103 health.
This is an absolutely terrible strat. Why is it even up here? There is no need for Iron Starlette to use Supercharge against Corrupted Slime. Corrupted Slime is a Magical pet; it cannot take damage above 35%. Wind-Up x 2 will reach this limit. Supercharge will not increase the damage.
Also, Mechanical Pandaren Dragonling, despite his advantages over Magical pets, is useless against the Tentacle. The Tentacle gives out massive damage, even against MPD, and is faster. Should not be used in this fight.
May I suggest a rework as there is no level exp worth mentioning, so the explode strategy is unnecessary. Mech dragon can finish it up with Breath, no problem, but the strategy as described is a little more complicated than needed now.
This is a good strat, but to Pla2pus#1287's proposed changes I would add: the Mech Pandaren Dragon is faster than the slime, so if it's going to take two attacks to kill the slime I'd go Thunderbolt and Breath. I'd also sacrifice Explode for Decoy since the XP nerf.
If I may suggest one change, Supercharge isn't needed against Corrupted Slime.
Because magic pets can't be dealt more than 35% of their maximum health in a single hit, the Supercharge is wasted.
If you go strait into another Wind-Up without waiting for Supercharge to come off cooldown it will make the fight slightly faster and less close at the end. I tested this and was able to kill Corrupted Slime with my Iron Starlette.
They nerfed the xp on these fights for 8.1; I think it's because you can redo the fights over and over (for the family meta achievement) and I don't think they wanted people easily farming pet xp endlessly.
The team of my own design that I'd been using had been hit or miss, and it required a L23 or L24 carry pet. This one, on the other hand, worked like a charm. It gained my L4 carry pet six levels. Thanks for the post, Lazey & Xu-Fu!