I'm not even sure if I knew what I was doing so um wee?
[EDIT]:
-AA'd every area of the image
-the teal you used was actually darker than the mid-grey tone so I replaced it with a light green and the brightest gray tone
-tried to simplify the gun by removing alot of the details and used pre-existing colors mostly
-expanded the shadow to show the gun
-removed that thingy under the blast, I have no idea what it was/is/will be
*tried highlighting the hand, but it destroyed the abstract~flat look of the image
As far as consistency, you could either A) AA everything or B) AA nothing; with images like this. I felt that the AA you added in was fairly random and inconsistent, you generally AA curved area, of which there are alot of in that image.
Maybe some of this helped, maybe it ruined the image, but it is still important to remember bright glowy colors are awesome, never forget that.
With your newer image, it's looking good so far. Rather wild.