New BLM, rotations questions and advice

[O-Deka-K]

You wouldn't get a quick Fire 1, because as you said, you're Transposing to take advantage of Astral for your Firestarter.

Quick Fire 1? You finish casting Fire 1 in half of a GCD, but you still have to wait for the rest of the GCD before starting your next cast. That would have no effect on your total damage (just a small burst increase).

You should cast a quick Fire 3 here instead. Fire 3 normally takes 3.5s to cast, but a quick cast will bring it down to 1.75s, which is still lower than the GCD. Therefore, your single-target rotation should start with two quick Fire 3's whenever you have a UI3 buff.

This is known as the double-dip mechanic, because the second Fire 3 gets the advantages of both UI3 (quick cast) and AF3 (+80% damage). This also applies to the "glitched" double Flare.

Sometimes latency can cause you to miss a double-dip, but if you can pull it off then you should.