[BLM Suggestion] Raise spell using Foul stack.

[GunksFoy]

BLM does have an insta-cast in the form of Scathe, which is essentially their Ruin II. Not to mention having access to Swift and Triple cast, potentially giving BLM four insta-cast spells in a row. With that and the other possible processes, BLM does actually have quite a few opportunities to get around animation lock, but it could do with a slight tweak.

Did you really cite Scathe? Not even CLOSE to equivalent to Ruin 2. Case and point:

Ruin 1 - 100 pot
Ruin 2 - 100 pot
Ruin 3 - 130 pot

so you lose 30 potency from downgrading for an instant cast.

Fire 4 - 504 pot
Fire 1 - 324 pot
Blizz 4 - 280 pot
Scathe - 100 pot....

so at minimum, you're losing 180 potency for casting Scathe at any given time. I didn't include Thunder because you might refresh earlier/later so exact potency is hard to gauge perfectly, but it's a loss I assure you. No one is using Scathe unless they are absolutely desperate.