Hi all,
As there were some issues to join as group, I tried to do the Mad King solo, which took almost an hour but it worked pretty well.
He won't regenerate his life so you can take all the time you need.
Bringing an Instant Repair Canister with you can be helpful too because there's no possibility to repair your armor inside the instance.
Otherwise you can just jump off the platforms before you die. Dieing through falling damage won't hurt your armor afaik.
http://www0.xup.in/exec/ximg.php?fid=19530416
regards,
Cruhling