Astacius

Distortion Strike is really good too. You might have too many creatures.

they should have reprint that..

Instead of Flash Counter, play Dispel.

Fireblast maybe?

Maybe not defender but colorless and powerful, Metalwork Colossus.

Why not both?

Wall of Omens is a must-have.

Since it is modern viable, maybe try playing Bogle list?
Gladecover Scout
Slippery Bogle
etc.

Add some black color, it is worth it. And try those:
Asylum Visitor, Bloodhall Priest, Drana, Liberator of Malakir, Falkenrath Gorger, Olivia, Mobilized for War, Stromkirk Condemned, Stromkirk Occultist, Voldaren Pariah.
Also Fatal Push is great.

You can try cards like Sakura-Tribe Elder to make this deck more vital.

Not too many lands?

it was looking much different some time ago, when i was playing it, the point is red is faster and much more flexible, but i will try your list

first, i would get rid of all these beasts

if you like so many cards you should play EDH

Play 4 Gatekeepers, theyre not so expensive as they seem to be on this site.

Gatekeeper of Malakir, Vampire Nighthawk, Kalastria Highborn.

And what is your budget?

You are barely using creatures so maybe try these: Slagstorm, Pyroclasm, Earthquake and something to draw like Browbeat. Or if you want to play more creatures try these: Kiln Fiend, Fire Servant, Cinder Pyromancer, Chandra's Spitfire.

Too many lands.

http://wiki.mtgsalvation.com/article/Summoning_sickness no, it doesnt, i was wrong