Aside from what monochromicon has said, your tanks or healers were doing something wrong. As for you as dragoon taking 28k to the face that's completely normal... If you are the only one getting hit by him.

There are still some people out there not knowing that Odin's regular attack is a swipe that will oneshot everyone unless the damage is shared between at least 4 to 6+ players. Also, each succesfull attack of his applies a damage increase debuff, so they will take even MORE damage.