When all else fails, get a staff with at least 1 rune slot and put a physical rune on it. Then respec all your points from Huntsman into Warfare and laugh out loud as your ELEMENTAL STAFF gets hillarious bonuses from warfare towards IT'S TOTAL DAMAGE. You might also want to bump your strenght to 12 and get as many + int plate armours you can find.
Edit:I am upset I can not post a photo of this right now because I can't take screenshots in game for some odd reason.
I have a staff whose base damage is 46-65 fire and with a rune I added 6-7 physical damage,acoording to character page my base damage with these 2 elements is 52-62. My overall damage is 92-113 per attack. I get +50% damage increase from intel, +30% damage increase from WARFARE (which is at 6) and +15% from Pyro (which is at 3).