Phase 2 is actually quite simple.

1. Be out of his range when he casts fire 3 to dodge the follow up blizzard
2.Heal through holy and flare
3. Meteor phase is pretty easy dodge the bad, but finish it off with a DB in the middle
4. Cleanse both dots
5. Place the thunders inbetween each of the charaybdis, the stand between the last 2 which doesnt have a puddle to dodge the pyretic and blizz
6. Repeat