Quote:You need a minimum of 285 AC to be valid against Hell/Hell monsters, otherwise you're basically considered naked.In NM with clvl 31, it's more than a maximum, not a minimum! Anything beyond 258 is wasted, because it doesn't make you better.
Apart from that I think your AC and Dex are your only real problems. Simply try to improve that. Vit is for noobs.:P
Secondly, you should avoid getting crowded. Keep an eye out for "bottlenecks" or corners with a spike, so that you have a base you can retreat to and get hit from max. two monsters at the same time. If you don't need to hurry, consider also taking a bow with you. Then you can bait monsters one by one.