199999 damage per triple throw star

Wait, Alchemist works on 'potions' that has either a time duration, or a set amount like xxx. If this is a buff, I don't see how Alchemist can work on it. That sounds ..weird.

Alchemist works on the HT buff, too.

I don't think this is a "force 200k damage" thing. One of my fellow HT runners did it too, but with the 300% buff. Her top stars were doing very close to, but not quite 200k. I postulate that Shadow Partner, which normally does 50% of the bottom star's damage, was made to do 350% or 450% (+300% and +400% respectively) of the bottom star's damage. Since the bottom stars are already doing huge damage, this is further multiplied by an error in calculation for Shadow Partner. That would also explain why the top stars do more damage than the bottom.