Whispersilk cloak may wreak a havoc with Steel Hellkite.
I am more concerned with the mana ramp up. Very often you will be forced to play Dragonskull Summit tapped early in the, as you only have 8 cards that may result in swamp.
Tainted Strike seems a bit off - you are likely to get two of them at most in a typical draw. Your heaviest hitter is 5. Chances of sommoning Hellkite or Angel, Cloak and Tainted Strike and hitting twice are really low. And single well placed Plummet should break it.
With so many artifact removal spells and abilities in [SoM] these combos you have may prove fragile - you may want to drop in some protection spells.
Yet, there is an infinite mana loop potential, which I am paranoid about ;) You may want to see and comment on my Myr Flood deck.
I took the Golem Foundry out for some Platinum Emperion . That should help with have a bigger hitter on top of giving another little something for the opponent to think about. I don't know what you mean by the Whispersilk Cloak wreaking havoc with the Steel Hellkite . Please explain.
I don't think you need all those platinum angels and emperions. What you DO need is something that capitalizes on your lovely infinite mana engine. Those Fireball s on the maybeboard look right, or perhaps Strength of the Tajuru or Comet Storm or Chimeric Mass .
After testing out your deck few times, I have to say that it's quite nice, fairly practical. Whenever I use Platinum Emperion , I usually combine it with Mask of Avacyn . While not whispersilk cloak, it provides hexproof and +1/+2, which I think is really, really nice. I suppose it's still fine, thumbs up from me. Also, with all that mana acceleration, modifying your deck is fairly easy.