This can probably be done at level 80 (the minimal level allowed in this fight).
The affinity essence used was Sandalphon but Huang Long and Isis work just fine (you'll just have to replace resist fire with null phys). Alternatively you can use Seigfired, Girimekhala or Rangda but you'll suffer a damage loss to cover up weaknesses (or lack of resistances in Seigfried's case)
For this strategy to work you need a demon of the Raptor/Avian race to allow the use of accursed poison. Using this skill will inflict Shiva with seal for at least one and a half to two turns. Anzu and Yatagarasu are the best Raptor and Avian demons for this respectively. Anzu having innate null elec which allows room for wind dracostrike or ice pleroma (on top of high ice pleroma) and Yatagarasu having skill potential in both recovery and support making mediarahans luster candies and debilitates cheaper.
You'll also need two demons with skill potential in both recovery and support. One to cast luster candy and bowl of hygieia boosted mediarahan and another to cast luster candy and debilitate (if you have extra room you can squeeze in donum magici). And finally an attacker that can spam bufubarion or (ice dracostrike depending on if they're physical or magical) to keep up the damage and grant extra press turns.
One or more members of the team should have repel or absorb phys for a chance to end enemy turns quicker and to stop the enemy from getting extra press turns from Ganesha's critical wave scoring crits. Whether or not said team member is you or one of your demons (Seigfried Rangda or Girimekhala if you're not doing this on NG+)
Prep aside the fight is just spam ice attacks on Shiva, luster candy and debilitate when needed, use accursed poison off cooldown (wait for seal to wear off first or else you'll just inflict something else on Shiva), restore mp when necessary and make sure Ananta never gets to act or else he'll heal Shiva for a massive amount effectively killing the run or put a strain on your mp restoration items. Also if you have the miracle for it guarding can increase the magatsuhi gauge and allow for a mid turn accursed poison.
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