BLM and swiftcast

[Garnatian]

Swiftcast should mainly be used for 2 things as a BLM, movement casts and casts that are longer than the GCD.

[Malevicton]

Generally when you use fire3 you already have umbral stacks, and if you are in such a situation swiftcast will work better with fire1 (you can get the firestarter proc before the gcd is up on an insta-fire. Save yourself a cast). Beside that specific situation, though, people are right so far. It's main uses are flare/mobility/opener.