@silMET you would stack attack power with rockbiter weapon agility main stat and spec into 5/5 mental quickness in the enhancement tree, and also go 3/3 mental quickness RE's. Also believe there is an RE that increases explosive shot damage by % of spell power, also there is an RE for expose weakness that makes it give spell power along with attack power. you would prefer attack power over spell power, because about 55% of your attack power gets converted into spell power from mental quickness. explosive shot also benefits from abilities like curse of the elements, along with the 5/5 ignite talent in the fire mage tree, and the fire power talent 5/5 that gives 10% fire damage bonus. however explosive shot doesn't count as a spell so it wouldn't benefit from the 100% critical spell damage bonus talents, but it does benefit from arcane power. Also to answer your other question, seething flames is definitely the way to go.