User blog comment:Mr.Bossman/Help with Ceadus/@comment-451754-20110824005216

Armor strong against dragon and/or water elements. Lagai armor works well. Weapon with thunder or dragon element helps, but anything with high raw damage and at minimum green sharpness will work.

Attack the face, hood, beard, and horns, but beware of your weapon bouncing off the horns. Bombs to the face are effective as well. Keep clear of Cead's water beams.

During the long swimming part of the fight, you'll mostly just get a few hits in, then swim along. He doesn't attack very much so it's easy to damage his beard.

During the second part, he'll attack in force. Lure him to the dragonator early and hit hgim with it. You may possibly have enough time to use the 'nator a second time. Try to get the 'nator to hit his horns. Use the underwater ballista as much as possible if you think your weapon isn't strong enough. Blocking works for most of his attacks but not the water beams.

Carry water seeds and dragonfell berries to cure those respective blights. High grade earplug, olympic swimmer, oxygen up are useful skills. Learn his attack patterns and the locations of air bubbles and underwater ballista ammo.