I really like your mama base. It might seem insincere, but seriously, 4-color mana bases are the hardest to put together, and this one seems great.

I would also recommend some dual lands that don't enter tapped, like fetch, shock, or pain lands.

Cyclonic Rift - resets your opponents' boards. Devastating especially when followed up by a wheel effect.

Noxious Revival and Nature's Lore - some recursion is always good.

Time Spiral - wheel that allows you to untap up to six lands. why the hell not? lol

The deck looks a lot of fun so +1. Reminds me of a friend's Nekusar deck when we started playing Commander. Have you considered the possibility of adding infect? The colors support it and Vile Smasher seems like a fun creature to put infect on.

I have a Leovold deck that has a lot of pieces you might find interesting. You should check it out.

ObamaIsIlluminatiOhYeah: Would it surprise you if I told you that I have not changed my manabase form the precon? I thought that they did a good job and to be honest, I am (relatively) poor, so I do not have the cash for a high class mana base.

Megalomania: I have been looking for a Cyclonic Rift, it's a matter of time till I find one. I like Noxious Revival, 2 hp is nothing for an easy recursion effect. Did you mean to post Nature's Lore? I like the idea of Time Spiral, but can't bring myself to spend the $20 on it, or to reshuffle my opponents' graveyards without exiling them.

Thank you both for your helpful comments! I have left some on your decks as well!