Quote Originally Posted by Rawrz View Post
If you swiftcast then Scathe, it will consume it. Fire III has its own proc that is consumed instead of Swiftcast. Abilities are not spells. They aren't what swiftcast is looking for.
Firestarter isn't an ability, it's a trait that modifies the Fire 3 spell to be an instant cast if it procs. You can't put Firestarter on your hotbar.

That Firestarter procs on the Fire 3 spell don't consume Swiftcast because they're instant cast already is still inconsistent, because the same doesn't apply to spells like Ruin 2 or Bio, which have instant cast built in.

It's a mistake to focus on people screwing up by accidentally Swiftcasting an instant cast spell. If all instant cast spells had the same behaviour as Firestarter or Thundercloud, you would have more options for casting while moving, so it would allow for smart play. Basically, Firestarter or Thundercloud offer an advantage based on inconsistent Swiftcast behaviour. I would guess that it would be helpful for SMN to weave oGCDs as well, but I am better acquainted with BLM.

(That said - SMN is also pretty well equipped for casting while moving, so it's likely that this feature is intentional to support BLM mobility if you're lucky with procs or planned a proc using Sharpcast.)