ok, well first things first i think, you really need to use washes on models going to golden demon comps, or be an expert blender, also fixing things like the 2nd picture shows the skull in that ring thing and the paint has dried attached to both. the washes will help the paint look less flat and more real. i also know that it is easier to see things in photos like these (being much closer than you could get with your eyes). personally if you were trying to do a power sword i would either use a much finer brush (or a bit if wire or something) or just highlight the edges and blend up to a white/ off white. to give your self more of an advantage look at these pictures and try spot any places you may have accidently hit other parts of the model with your brush.
its the little things that get the big prizes.
i dont want to sound like a downer with the above comment. it has great potential and with a little fixing up it could be a great looking model