A bit rough around the edges but I really like this sculpt, so I gave it a go.Kept the base simple as the mini comands attention, no matter how crapily he's painted.
Purple is a very difficult color to work with, but you seem to be tackling it pretty good here. The base and metallics seem a little plain. Although I know you wanted the figure to pop out, the base should still be worked to give the figure some context. The metallics could use some shading, perhaps a thin smoke wash or black/brown ink treatment.