Having tried for Old Ironjaw a few times in Forlorn Cavern, but being ganked constantly,
I remembered that Old Ironjaw can be fished in the lava too.
So I rode in into the great forge, and dropped down into the lava, knowing i would die.
However there is a hidden ledge between the wall and the rotating wheel, which is easy to find as a ghost. (from memory the coords are (50.4, 47.9 or 50.4, 49.7)
basically when you swim underneath the wheel, you get stuck. thats how you know your at the ledge. now simply jump up on is as ghost, and come back to live.
You need to set your camera distance to max. Look at your toon, directly from above, and then tilt you camera, so that the wheel is on you left side, and you can only see lava in your buttom right corner. that way you can just see you lure.
Allies has to be lucky to see you, or know your there. but more importantly the 2 housr i spend there i got spotted twice, and both times the ally died trying to kill me, as they fell in the lava.
I will try to add some screen shots, to this post