Really nice clean work you have there.... what your doing is a very effective and looks awesome, but your saying you want to push yourself a bit further. What I noticed on the cloak of your Belisarius Mini is you were building up a very nice blend to the highlight, then all of a sudden slapped on (in want of a better word) an orange edge highlight and called it finished... seems like you may be going down that path with this one too. With a couple of progressions of colour in the edge highlight (which creates a kind of a glow to the tip) and a few really bright spots in the highest points, that cloak wold have been next level amazing. Using a glaze over this build up will transition them into the underlying colour too...
i realise I’m being extremely presumptuous in saying this,, but I think you definitely have the skills to push your effects a little further and achieve magnificent results.