Quote Originally Posted by Malevicton View Post
That split second of waiting is about the time it takes for wholly another fire1 cast. Don't think of it as losing a firestarter as much as gaining an extra fire1, because that's what is actually happening.
I think thunder feels about right, especially since it's a much more passive proc than firestarter.
You must have some insane spell speed if you can throw out a fire1 in the tiny amount of time it takes for firestarter to proc in between casts. One of those things I would have to see to believe.