I didn't help myself with the fact my build was awful for combatting this specific boss solo I think it would have been faster to have Agidyne or Bufudyne instead of going for a physical build since your hp caps out so low and physical uses up hp you have to be particular when you attack.
I used the bead ring Nanako gives you for increased dodges. The 1 main rng portion of this fight is Worlds End. It can inflict you with any ailment and the Izanami will follow it up with Summons to Yomi which instantly kills anyone with an ailment on them. Unshaken Will can only do so much as you can still become exhausted or poisoned which is fatal without Rise's endure. It wasn't a hard fight as much as a war of attrition chipping damage down safely when you can.
Half of my Izanagi's skills were absorbs. I think the only one really necessary is absorb physical just from preventing crits from things like Agnyestra etc you could really just swap the build for Mind Charge, Agidyne, Heat Riser, Unshaken Will and a few others. It was a fun fight much better than P3s since at least Izanami is level 90.
Enjoy :)