I couldnt get him down until i hit 75 and got lava burst. that spell alone helps so much, i highly recommend getting this http://www.wowhead.com/?item=38361 which can be bought after doing 1 session of dailies in venture bay in grizzly hills. plus theres a glyph that gives lava burst an extra 10% bonus from your spellpower. im hitting 7k lava bursts in mostly blues..