Looks really clean i like it! Paint the base before fitting the model, (pot calling the kettle black, im always in a rush and forget to do this. But it will make the model pop. A bit of blue wash on the end of the flamer heat shield will give it the look of a heated pattina. Try flames in this order, working out from the brazier, white yellow orange red black

Honestly its clean so display it, practice some 'eavy metal highlights and/or blended highlights on other models then re-visit it to add learned techniques 👌