Hmm, you know Wonkle, I'm following your route, but there's been one problem. I'm at Level 4 by the Marsh Cave, but getting to Level 5 without getting my butt kicked by the monsters is proving to be quite a problem. What do I do?
Do more battles before getting there. You should be already close to level 5 when you enter the cave. Inside, just go for undeads, and combinations of spiders. Maybe mucks, but not scums.