Everything "
imho" of course, as it's a personal taste:
The green on the robes look a little heavy, too much contrast (and colour diversity) to the dark blue armour. But I must admit that robes are one of the more difficult areas to paint ...
Overall it's not that bad, I've seen much worse models. What I appreciate is that you paint very cleanly. The shoulder pads are nicely done I think
The coils on the Plasma weapons could also use some shading.
Definitely browse some tutorials in the internet about "Drybrushing", "Highlighting" and "Shading". (personally) I'm not the fan of drawing Lines on the Edges, but I love drybrushing to define edges and higher areas and shading to give the model a little depth. It works wonders and brings basic models that look like pre-painted D&D figures to a level of good-looking models