Over a primed Nighthaunt mini paint all etherial parts in Averland Sunset. Use several thin coats to get an even finish.
Let the Yellow dry.
Prepare the other colours gradually. Before continuing with fire bright dragon, paint the etherial parts adjacent to the cloak (2-5 mm) with some watered down Averland Sunset.
Paint the Fire Bright Dragon onto the mini leaving a few milimetres yellow. Use the wet Averland Sunset to wetblend the yellow into the orange part. Gradually continue in the same way until you paint just the tips of the etherial parts with your darkest colour (Khorne red in this example).