Sparkle is hilarious. Assuming it isn't the only target, it just murderizes anything that looks at it funny. The Sparkle and the Owens D are my new favorite assets, they can take on pretty much anything given some cover, luck and balls.
Edit: How to nerf the Sparkle: Give it 2 ArrowIV launchers instead of 6 SXPLs. It would probably still be less OP.