I piloted a similar deck up until recently. My version ran 3x
Platinum Angel, because she's positioned so we'll against a lot of the meta. The only suggestion I'd make for this list, is to find room for a
Surgical Extraction in the sideboard. When coupled with
Ghost Quarter, it can really put you ahead of R/G Tron - which in my experience is the worst matchup for Mono U Tron.