The subtle blue looks good, but I'll echo the calls for fire based weaponry. I did mine like this:
The overall effect simple went from Scab Red as a base, through Blood Red, Troll Slayer Orange, Yriel Yellow, Flash Gitz Yellow and finished with an highlight on the tip with white - so it's simple enough to do, especially since you've already got blending down to a T - Which you'll note I haven't

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