[Coda]

No, Shiva from the Indian Gods series. Shiva Dragon's active skill wouldn't help at all. You could also use Top Droidragon, but that gift dungeon hasn't been around in a while now.

Neptune or Cleopatra have poison that are strong enough to do the job as well, if they're sufficiently leveled up and if you have an Ultra Gravity user (Hera) in the party. (Neptune is strong enough to do it without Ultra Gravity. Cleopatra is not.)

I also bring Lilith along in that dungeon to use her weaker poison to take down the Super King rounds. The normal King rounds I battle through the slow way to give the poisoners time to charge.

And then I use Grape Dragon as my leader and either Grape Dragon or Lucifer as my ally leader in order to have ridiculous amounts of HP and RCV (because ATK is pretty meaningless in that dungeon).