Current problem with battle materia

[baklava151]

The reason it works so well for BLM but no other class is because BLM is the only class that has 100% of its damage on the GCD.
BLM doesn't have a single oGCD flat potency hit, all of its oGCDs are GCD enhancing like Ley Lines or Sharpcast.
But if a good chunk of your dps comes from oGCDs which are unaffected by SpS/SkS then it quickly loses value compared to crit, which aways affects both.

That's true but even then some jobs like SAM will still meld some SkS to a certain point depending on what they want, and even though the fastest tier is a slight damage loss it's still very viable. Not that I take SAM into high-difficulty content but I still like going fast as possible so it's nice when the option is there.