Here are a few additions you might want to
consider?
First off, is there a reason you're not including more Landfall? Some good and cheap options would include
Lotus Cobra (a must, imo),
Territorial Scythecat,
Undergrowth Champion and even
Avenger of Zendikar isn't all that expensive I think.
Scryb Ranger and
Quirion Ranger are two additions you should definitely try to find: tap a
forest to play either, use their ability to return themself to hand and untap the
forest, and you can then tap that
forest again to replay and repeat as often as you want. You get an infinite number of Landfall triggers and, if your
forest has been enchanted with
Gift of Paradise or
Nature's Embrace, you can even make infinite mana (although I'm not sure what you could use that mana for).
Tireless Provisioner could be of use here, since you could use those landfall triggers to generate clues and therefore draw all the cards you need...