I built a deck extremely similar to this before the Avacyn Restored cards were shown and I was using Momentary Blink
and a bounce creature to duplicate your Cloudshift and Ghostly Flicker.
Well I found that not having any mana ramp and trying to cast a 3 or 4 mana splicer every turn and bounce it at every opportunity was very sluggish. Against a deck with cheap removal or cheap burn your splicers will get targeted badly. I was thinking maybe everflowing chalice
or silver myr
along with Tempered Steel would make the deck more dynamic and threatening to your opponent.
I do like your addition of Wrath of God though, counterspelling/stalling early, dropping tempered steel, setting up your mana then using wrath of god is a great way to get your Golem army rolling.
Here is a smaller creature thats great with a bounce effect if you're interested - Epochrasite
Oh, and a golem land - Dread Statuary
Good luck with it.