Oh makes sense. So the entire text should be flames. Yes I was changing the ALT-F font explorer text to different colours to test.
I quite like the flames 'behind' the text with the mix version, plus if you add semi transparent outlines the 'flames' also alpha out with them, giving a really nice cartoony effect especially when you set the warp intensity to something like 1000:
The custom burn settings (using the mix version I posted above):
There is a hard border on the left though which I have no idea how to fix (I'm using it on the name vbox). But it looks great for now.
Of course this would be tough to read in dialogue text cos it's quite over the top. (I'd love to have this effect on an image haha)
Really fun shaders!