Looks pretty good. I'd take out 1 Oblivion Ring an main 1 card:Cathars' Crusade. It would be good to draw into mid game to buff up the token's.

Not bad

Take out the two Somberwald Vigilante and the three Instigator Gang  ^Flip and replace with 4x Stonewright and 1X Hellrider . Stonewrights soulbond ability works wonders with Silverblade Paladin

In an aggro deck such as yours, your tempo seems too heavily reliant on land. Its generally better in aggro decks that cant afford to miss a play to splash a color rather than 50/50 splitting. In other words it hurts us aggro players alot more to have to wait an extra turn to play our turn 1/2 drop than it would for a control player.

So, I would recommend focusing your first two or three turns more on either white or red, and upping that respective colors land count. You might have to sacrifice a creature or two but it should increase the reliability of the deck for you overall

Nice. Maybe add some Geist-Honored Monk . It could be a good strategy with Cloudshift .