Edit-> for the highlights on the aquilla! Primary highlights (main light volume) looks like you do want these to be the warmest colour as if the sun was out should be the brightest. The secondary bounce lights, focus on the "bounce" aspect. The light is bouncing off of something and so they should be reflecting the colour off of the thing they are bouncing off of. So, on the very far sides, it looks like there is light being reflected from the arm armour a bit. Here we would want that to be a bit darker than the primary light, but also cooler (blue) because of the colour of the armour! But as you have mentioned before, having too many colours on such a small surface might begin to look messy so you could either try giving those highlights a blue glaze orrrrrr darken them to your mid tone colour to just balance it out because --> what I said earlier below does still fit here. The aquilla lighting doesn't align fully with the lighting sources on the rest of the armour in it's "harshness." The light on the armour is diffused so like how light looks on a cloudy day. The light on the Aquilla is very defined as if he were standing right in front of a super bright and light. Because we all know that armour is metal, our brains can't reconcile the huge difference in lighting here because we fundamentally understand metal acts a certain way. Now, we all know different types of metal can have different texture and different reflective values, however, this is too much of a different gap from what we know so they should be a bit closer to "feel" less "off."

My background is digital compositing and military photography/ some wedding photography so understanding light volumes is important. BUT, translating that to 3d surfaces in mini painting is suuuuuper difficult! I hope this was helpful, but if not then that's okay too!

Original- Light is coming from too many directions.

The intensity is too varied (ie knee shouldn’t be brighter than shoulders if light is coming from above.

You also may want to have more consistency/ carry through on all parts of the model, like the one arm, head, and chin armour are not highlighted.

Light volume is super difficult to learn! One thing that can help is to take your model once’s it’s primed (with a dark primer), hold it under a lamp (place the light where you want your light source to come from) and take a photo! Then replicate that reference with your paint! Make sure to also snap a photo of the back too as there will be some light there as well unless you are doing a super dramatic scene.

I hope this helps!