I just posted about getting through the last level on the other thread. In the end, I didn't have enough gold for the Boots of Hardiness, but made it through anyway. Using Silence and the Gloves of Concentration I managed to set a few more traps than I managed before, and that tipped the scales!
I opted to take Weapon Focus (Longbow) when I relevelled, and with the bow from the Guardian Spirit I hit most times. When fighting gets to close quarters I pull out the Mace of Disruption, and that works well for me. Now I'm off to the North Road and the caves to try my luck there..
Thanks for all the advice and comments, guys!