This is a casual deck. We're playing without any sideboards. So the deck should be a little bit more flexible. Therefore the artifact hate. And raw power is not the dominating goal when building a deck. This deck tries to use and abuse Radha's mana giving ability preferably in combination with Psychotic Fury.
Permalink
The Leviathan is a 7/11 trampler! No need for land walking here. While spreading Seas as a cantrip at least, Convincing Mirage is pretty useless. I would ad 4 playset of the tri-color lands from ALA-Block to smoth out your manabase a bit more. For your not that fast I woulc cut some of the the land auras and add a couple of bouncers to buy some time.