after many wipes in last days (10 or so), stopped always by stupid cavern closed bug, today finally done with my pala team. in heroic ofc. and at first attempt. tanked him in middle and burnt avenging wrath at start, avoiding to stop dps during debuff, and moving really little, just when he kick me away or when he freeze ground and get his buff up.
when he called his melee range instant ability (he says somenthing before it, read on wiki) i used divine shields on all, healed a bit and finished him. he dropped new 2h axe .