Welcome aboard! I played a Dawnish battlemage for the first time at the July event. (not my first ever event though)
With regards to the artisan thing: it might be possible and finding a way to make it work could provide you with an interesting game. If there are a handful of you who coordinate your known items and resources (mines/forests), you could find yourself able to keep yourselves in a cycle of making each other good equipment and trading the surpluses.
I quite like the look of the cheap staves that give you two castings of an offensive spell per day - eg Enfeebling Echo, and a Warmage’s Belt to keep me on my feet. It wouldn’t take much coordination to work out a group that could keep everyone in both items on a permanent basis, and still have resources/items to trade away.
I considered it myself but decided I’d probably have more fun not being an artisan but taking extra mana and spells. The Heal and Empower suggestion comes right from the War witch section, and it is why I chose to start with those spells. I didn’t get anywhere near as much use out of Empower as I had expected, but I am keeping it and will just make it more known that I have it next time I go into battle! I agree with Mark about Restore Limb, I really missed not having it, so I boguht it with XP.
For weapons: I went onto the battlefield with a staff and a short rod. (imagine the magician’s equivalent of a short sword). It’s weird to carry weapons around Anvil with you all the time, but a short sword or rod is practical. My staff is stab-safe, six feet long and was my primary way of dealing damage, especially from the second rank over the shoulder of or between Dawnish knights. This also meant I could see who was taking a beating and escort them back a few paces behind the line to heal them and get them back in the fight. Carry a bag with bottles of water too and you’ll make a lot of friends!
One cool thing you can do with a sword as a mage is to cast Empower on yourself then use it to deliver a CLEAVE. It’s a bit awkward to do and I’ve never done it succesfully. Easier if you are fighting with a rod in one hand and a sword in the other, but you need the Ambidexterity skill for that.
Mage armour: It is very hard to find off the peg. The best way to do it I have found is to look for lighter armour items and either have them customised or do the customisation yourself. Other people who are better at crafting than me have made their own entirely from scratch.
I had some customised pieces made by Darkblade. You can see I have dark blue leather engraved with astronomantic symbols representing my favourite constellations to do magic with! Strictly I don’t need the gorget/pauldron piece for full covereage but I wanted it anyway.
If you want to make your own, you can paint with acrylic paints on fabric, it works remarkably well. Before I decided to splash out on the heavy leather mage armour above, I was going to make some with some cheap padded bracers, greaves and gorget and painting on appropriate symbols. This is a tutorial on painting banners for LARP, the same technique works for painting runes, heraldry, etc.