A very odd, but interesting design for Pugna. I actually like how he\is body appears to be disproportion. Gives him some real personality, while also going well with him being really intelligent, but incredibly weak.

I think the mask is good for juggernaut.

Also have you considered maybe making the cloth around his body enwrap him completely, so the only part where you see his green glow is coming out of the collar, giving him a spot light kind of effect? Here's a picture sorta showing what I mean in just a quick sketch:
http://imgur.com/J9ru6Xt

Sorry for the huge wall of text and that is all of course just my two cents, I love the set though, hope it gets added!

Really interesting set but I find it looks a bit top heavy; his head and collar are very large while his arms and lower torso are very thin. Maybe remedy this by adding some shoulder pieces or making the head or collar smaller.

Also the loading screen is amazing, by far the best thing about the set. It shows off the skull, the swirl and the flowing scarf really well, but ingame the swirl is kind of dark while the horns are really bright, sort of taking your attention away from the rest of the skull, though this might be because your screenshots have the glowing immortal on but I may be wrong. But yeah maybe make the horns a bit darker, especially the bands around them or maybe just make the swirl a bit brighter or even glow.

Thanks :3

I really like the flavor of this set. Good Job!