I've had a few people asking me yesterday how to train dungeoneering. So, I made a quick guide explaining everything you should know. Please leave any feedback you may have.
First off, how to get there.
Next there are two chests with starting materials.
Next thing you want to do is run east and go through the first door. Then, kill the rat, go through the next door and repeat.
Once you go through the dungeon, you will end up in a room with a gap and 2 levers, the right lever is only accessible if you have 99 agility, it also gives bous exp and tokens. So, click the left lever and you will come to the boss room. Here is a picture of the levers:
Also, at the room with the levers, to the east is a room with a chest. To get in there you need 99 thieving. This chest gives 10k bonus exp. Here is a picture:
The boss uses magic attacks, so protect from magic.
Once you kill the boss, you go to the west and click on the door. After that you can continue with the items you have or leave. Here is a picture of the door you click.