Wands are great for crafters to use, and mage weapons can be very helpful, if you have 40 - 50 real skill in magery. I use jewelry on my crafter to boost magery at least 20 points to help offset the mage weapon penalty (if you are on Siege, and can get someone to loan you swords of prosperity, you can use your Siege bless on it, and it has no penalty), and I hold a crafted +12 spell book when casting, and I can summon elementals then, with scrolls to eliminate fizzle or without scrolls if I can deal with some fizzle. (With my best mage bonus jewelry, and spell book, I have 100 magery on that character).
If you are playing on Siege though, which I seem to recall you are, the problem is you have to be prepared to lose anything you take. Fortunately, +10 jewels, and the crafted spell book are easily replaced items though if there is a mishap.
I took the same crafter on a few hunts with my bard/mage friend. I used a golem, and he used discord/peace on the monsters. It was quite a thrill to kill poison elementals, and the like. My character didn't even die once while he was helping me, and he took me into some pretty hectic places. I used potions, wands, and spells in combination to keep myself healed/cured.
If you are a GM lumberjack, I think you can do some damage with an axe/hatchet (I seem to recall trying this a while ago with some hatchets I crafted that had the max DI with arms lore bonus) but I think the golem & summons are your best bet in terms of dealing damage.
-Skylark