At 50 dex, you are completely untouchable. If you put all your points into dex, you'll reach 50 dex at level 16. This can be easily reached by level grinding near the beginning.
A good way to get exp fairly quickly is to get the kamikaze item and play against players a few levels higher than you. Just make sure to be right on top of them when you die and you'll rack up the xp.
When Andy drinks a lot you might as well just push him over and take his wallet, would save everyone involved a lot of effort and would have the same effect in the end. :P
I find myself pulling mobs out of rooms one at a time so i can slowly beat hem to death with a large smelly fish so that i have a better chance to get completely useless loot out of them. I'm kinda tired of all the worn armor, non-magical rings and incredibly sub-par weapons (that i won't use cuz of the fish anyways) the game seems to think i want.
I'd like an interface to switch between characters more easily. I tend to have to split my mage off of the party to explore forks in the path and scrolling all the way back and forth across the map to control all the characters is a pain.
Once you have all the non-boss critters just use the flies and run through the non-boss stages quickly. This will make the game that much more bearable while you hunt bosses. If you happen to find a new boss critter in that one tower level you can still bite it to death if you're careful.