If you like bows, I'd recommend hunting barbarians in the wilderness. They drop arrows commonly when they're killed, and if you run around for a really long time and let them shoot, you should be able to get some arrows from that. You can normally put together a set of slaying ammo from that type of thing if you give it ten minutes or so. Swamp hydras can be used to train your missile skills very quickly if you haven't been practicing with bows very much.
Do you have access to the rune-covered trident? I'm guessing not, but that's an obvious easy one.
I'm not sure how much good mindcraft will do without GTB. I've never found most of the earlier spells particularly powerful.
If you've got a scroll of familiar summoning, I'd use that on the 3rd floor and lure the ACW down (most monsters are immune to 3rd floor heat but not 4th). There's about a 50% chance that the scroll will generate something strong enough to kill it in my experience.
If you've got a spare PoCC, smashing that at the Wyrm will soften it up a lot. (Aside: does PoCCing a monster make it mindcraft safe? Anybody know?)
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.