IMO the blending is fine :P
lol
BUT
its the lighting i dnt like :P
the lighting should be coming from the CENTER of the top.......
also.....
with eash of the lightsabers, they should be procing slight glows on grievous' body....
to do that......just use a 25 px SOFT brush (0%) and gaussian blur it quite a bit so it produces a slight glow......then just change the colour of it if u need to :P