OK, I've tried Twisting Corridors layer 8, floor 18 boss twice (solo MM hunter) and both times I got Patrician Cromwell, who is basically an unkillable rapid caster. First time he had 9.4M hp, then I read that the pet may be considered a second toon for scaling, so I zoned in both at the beginning and to floor 18 without the pet. This time he had 10.2M hp, so obviously the pet makes no difference, his hp seems to scale based on your hp (I had about 215K hp at this point). My question is, is Cromwell always the end boss? Has anyone fought any other boss on layer 8 floor 18? And if you beat Cromwell, any tips? I've tried the bombs, line or sight, running far away back and forth. Nothing has worked.