After you defeat shiro in factions (last mission) you get in an area where there is a weapons trader (and some other guys but that doesnt matter) this weapon trader can sell you a sword with +5 energy for 10k, 40 iron ingots and 6 steel ingots if i'm correct. It also has a +5 energy bow, axe and hammer... i'm not sure about the staff...
if you dont have factions i can get one for you

for a little price of course
*EDIT* the sword is max dmg and has req 9, but has no other mods...