Dps comparison

[Madoka]

Scathe is weak, Blizzard I is better, the only reason why it is on my bar is when I have to move during more than 3 seconds and I usually forget and it barely affect my DPS because it's weak. If you're holding procs because you predict you'll have to move in 3 seconds, you're losing DPS.

I think his point is using scathe for the instant cast. It's not that weak. Still stronger than Ruin and a better option than not doing a damn thing. and its random chance for bonus potency is pretty awesome.