Also, for fire mages, it has been suggested that weaving in Fireblast into your rotation is a DPS increase (not yet hard confirmed). But it would make sense that if you are fishing for a Hot Streak proc to cast Improved Fireblast after a FB crit to increase the chances. 8% crit is nothing to discount given our initially low crit rates. This also coincides with Blizzards idea of "fun" by adding more complexity and decision making while casting your "rotation".