For the axes and hammers, yeah it's tricky within the existing values. My ideal solution would actually be to make and apply a weapon mod, because the issue is a pet peeve of mine. (I think the two-handed weapons and good one-handed battleaxes are undervalued, and daggers overrated. I'd call the existing Axe a Woodaxe for foresters and other non-pros, and make a one-handed battle Axe cost more resources but have no negatives to skill, like the difference between a Maul and a Battleaxe.)
But given the existing weapons, I think I would suggest adding a non-magic Dwarven Axe weapon with say damage 7 or 8, attack 0, defense -1 or 0, length 1, and giving it a noticeably higher resource cost than the Hammer. I'd also have a Dwarven Battleaxe with at least damage 10, just because.
Also I think your Helmsfire Greataxe should be length 3.
Code:
Existing stats:
Fist -2 -1 -1 0
Dagger 2 1 0 0
Hatchet 5 0 0 1
Axe 7 -1 -1 1
Hammer 7 0 -1 1
Shortsword 5 0 1 1
Broadsword 6 0 1 2
Maul 9 0 -1 3
Battleaxe 9 0 0 3
Your added stats:
Dwarven Pickaxe 3 0 -1 1 (AP)
Dwarven Hammer 8 0 -1 1 (magic)
Dwarven Maul 11 0 -1 3 (magic)
Runed Greataxe 10 1 0 3 (magic + undead)
Helmsfire Greataxe 10 2 0 2 (magic + fire)