OK so I accidentally came to the same conclusion as Krule. Accidentally because I just worked on it some more and it looked better. Couldn't figure out what was wrong and why it was now better...
Then Krule posted and nailed it!
So here is the latest version:-
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I basically blended more orange then darkened up the edges with a darker red. On the extreme edges I used a brown wash to get the slightly smokey effect. I didn't want to push it too far though, I wanted the magical fire to be "clean". I need to touch up the blends on the staff as I've noticed the pure white is a bit heavy handed. Can't really see it on the mini but it's obvious on the photo.
I'll probably also add some white to the *really* hot parts as suggested, and maybe darken the flame by the hand.
I've also started a couple more mini's. First up the "sexy" fire elemental. Why a fire elemental should be sexy I don't know, but it's a cool figure and the proceeds for buying it went to charity so *shrug*.
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It's a really great mini from Zealot apart from one thing; it looks like the mould wasn't aligned properly. You probably won't notice from the pictures but there are parts in the flame that are abrupt and basically impossible (at least, for me) to patch over.