Yeah sorry about that! Rats were changed from living (tameable) to undead shortly after I wrote that guide and I've never gone back to update it. Call it a surprise if you like
To Jimmy, what class are you? Try all the caves with mobs around your level (a full list is in the link in my sig, also sticky thread) and see what works out best for you.
Your kit will be key here, on wiz aim for as much MC as you can, on warrior aim for as much DC and speed as you can! Speed is vital on a warrior. If your items are a lot lower level than your character then have a look around for some higher level stuff. Get the names of the items you need from the item guide (also a sticky thread, but not for me, there's a link to a google sheet inside the first post), then you can search shops and auction house for the things that will help you.