First up, thin your paints. They are far too thick all over really. Use many thin layers especially on red and white (The face and the armor).
You need to build up your metals through far more layers going from a non-metallic basecoat to a bronze that is highlighted, scarcely, with burnished gold. Your precision on the eyes looks good from what I can see.
The cloak needs to be basecoated in a brown and then drybrushed. Make sure your brush is completely dry before getting any paint on it for when you are drybrushing. Do >not< water that paint down, I would just get it straight from the pot and rub your brush on a paper towel until very little paint remains on it. Then drybrush. Do this in multiple layers, doing less of a drybrush (spending less time) each new layer as you get brighter.
If you want a cool looking sword you'll need to back over the blue and glaze like a madman. Don't buy into the Lahariam Medium thing that GW has going, just use a CLEAN CUP of CLEAN WATER and water your paint of choice (preferably a slightly darker colour than your brightest colour on the sword) and then glaze it over the blues you have on there. Repeat this several times until you notice a change in the smoothness of the gradient. You can actually do this up from your primer but it will take 30+ layers for the desired effect. Don't do the lightning unless you are confident in painting freehand and highlighting it freehand.
Also have 2 cups for washing your brush out; one for when washing metellics off and one for washing non-mets off. This water is also your 'watering down' water for the respective archetypes as well, so keep the cups clean as well as the water.