I think you're going to need more lands. You have a pretty high curve, you need to be able to drop
Thrumming stone regularly on T5 (or sooner) if the deck will be able to go off. I'd suggest some mana rocks for acceleration instead of the Kaldara Equiptment. You'll be saving your mana for the
thrumming stone, so a hand full of sheild of kaldara will be pretty useless. I'd suggest the
Talisman of Dominance, since that will give you access to blue, to potentially hard cast the ninja, and you could drop it on T2 and still cast a
Shadowborn apostle that turn.
Warden of the Wall might even be useful to give you a blocker if you need it, but tap down for the mana to play
thrumming stone earlier.
If you can afford the cards,
Deathrite Shaman and fetchlands would be boss here, you could have two talismans and a
deathrite shaman on T4, then you could drop the
thrumming stone, cast a
shadowborn apostle and thrum, AND crack the Apostle for a demon on the same turn. You could also do this if you have enough 2 cost mana rocks (say
Talisman of Indulgence and perhaps a few signets) because a T2 talisman will get you 4 mana T3 for two more talismen, which will be the 7 mana on T4 to go off.
Maybe consider some control like
Doom Blade,
Quag Sickness or
Mutilate to help you get to late game when you can cast a
thrumming stone.