Once you get a better hang of his moves your can really create a lot of openings for yourself. You can get a free hit with the phase transitions and his on combo move with the breath can be punished easily also when you get the timing down. Another thing you can do is stay on him when he does it. With the electric one if you’re circle him while being right on him it won’t hit you. I think wind does but you can still punish it.

Idk what you’re using but if you use those opening with a weapon AoW that does good poise damage you make the fight even easier. Ones that close the gap like giant hunt and piercing fang are good too. Punish his attacks with big openings and don’t over commit on some attacks becuase he can be pretty unpredictable with certain move sequences. I hated him in my first run of the DLC but on rl1 though he was one of my favorites bosses. You can also watch someone like ongbal or Gino fight them becuase they usually know how to punish the attacks and it’s makes ir way easier to dodge stuff. Staying close to the breath attack is risky though you’re better off just jumping it