Control-style:
4 Flamekin Harbinger
4 Smokebraider
4 Incandescent Soulstoke
3 Supreme Exemplar
4 Mulldrifter
3 Reveillark
4 Shriekmaw
1 Cloudthresher
1 Wispmare
1 Spitebellows
4 Nameless Inversion
4 Makeshift Mannequin
4 Primal Beyond
4 Reflecting Pool
2 Graven Cairns
3 Vivid Crag
1 Vivid Moor
1 Vivid Creek
6 Mountain
2 Swamp
Sideboard
1 Wispmare
1 Ingot Chewer (?)
3 Spitebellows
3 Final Revels
1 Reveillark
1 Eyes of the Wisent
2 Cloudthresher
3 Thoughtseize/whatever
...and a more aggressive one:
4 Flamekin Harbinger
4 Flamekin Bladewhirl
4 Sickle Ripper
4 Smokebraider
4 Incandescent Soulstoke
4 Ashenmoor Gouger
2 Spitebellows (kills Doran, CC)
4 Lash Out
4 Flame Javelin (hard to play for RRR but probably fine for 2RR)
3 Shard Volley
4 Graven Cairns
4 Mutavault
4 Primal Beyond
7 Mountain
4 Swamp
SB:
4 Fulminator Mage
3 Thoughtseize
2 Wispmare
4 Reveillark
2 Spitebellows
These are completely untested but they seem pretty powerful. Not sure if the aggro version would benefit from Mulldrifter, or if the control build is just better. Some bastardization of the two may be best. There really isn't a metagame to shoot for yet, but I thought these looked powerful and I haven't seen much like them yet. Gouger in particular is pretty hard to deal with so he may find his way into the control build.