Redesigning fire 1

[Rongway]

when I am casting Fire 1 for a second time because i'm spamming the button and its already casting before the Fire 3 proc shows up from the first Fire 1. Then I have to stop casting by moving or ESC and cast the Fire 3 proc.

Never interrupt Fire 1 just to use the Fire 3 proc.

Fire III is a damage loss over Fire I unless it is instant. The reason for this is that it does 33% more damage than Fire I but it has a 40% longer cast time. When it's instant, it does 33% more damage but takes only the same 2.5s GCD that Fire I takes.

Interrupting Fire I will cost you more than 1 second, which will negate the benefit of Firestarter. If you can't register the Firestarter proc fast enough to press the Fire III button instead, let your Fire I cast finish.