The rings are good, as long as you choose a color thats not in your deck. This deck might benifit from the regen or hexproof rings instead
Permalink
Searing Spear would be a great replacement for Brimstone Volley. As for the Slumbering Dragon, trade it out for the Firewing Phoenix
I know that Primal Surge is high cost, but with the complete lack of spells, it would work wonders for getting any card you want out.