S Ranking Seth-Rah, Spoilers Options

[Seans]

How many times have you done it, and how did you manage to do it? I've only done it once, with Serene and Fia since Lina died..
I equipped them with Einherjar, Grand Sabre, Infinite Arc, and Pheonix Wand. The rest is pretty much self explainatory. Ein attacks with Einherjar and Divine Ascension when Seth-Rah is red, and Serene attacks with Serene Absolute when he's blue. When he turns red again, I use Diaresta. S Rank. ^_^

Anyways, I'd like to know how you people did it.

[ChefMKT]

If you're trying to go for maximum points, then you'd want to S-Rank every battle.