Quote from MithraoAnimar is a pet deck of mine as well. Cards you run that I've found to be sub-par include:
Sol Ring/Mana Crypt: Not worth the space in this deck
Shinka, the Bloodsoaked Keep: So low utility, much better to have a fetchable land
Okina, Temple to the Grandfathers: see above
Oracle of Mul Daya: too slow. Azusa has been excellent, but this one has never been worth the space
Body Double: Why? Seems win-more, and completely unnecessary.
Genesis: I cut this. Too slow, rarely useful. Animar is just way to fast to need this card.
Now, I'd love to hear how these two have been for you:
Green Sun's Zenith: I use Chord of Calling...I've never felt this was necessary. How's it been for you?
Mind's Desire: Interesting choice...but seems excessive. Has it played out well for you?
The main reason Mana Crypt + Sol Ring have remained in the deck are Mind's Desire + Tidespout Tyrant. I also agree on all the creatures you suggested, they are all slow and clunky, so is Solemn. I haven't formed an opinion on Green Sun's yet.