my, might need to chage sig from f2p to P2P. OT: the bolts power does vary, you might need to experiment to test the difference in power yes the x-bows are all the same speed id go with fire bolt, as appaerntly from what i've heard, the metal dragons arent very resistant to fire based attacks (only thoery, yet to test) seeing the KB didnt state its not affected, i'd say power varies from mage bonus/lv and slayer lv. from estimate the spec bar takes i think 4-5 mins to fully replenish. hope my answers help. :