Full Auto

I hate to break this to you but, there's no single grid that is always good on every single content. You want the most foolproof grid? Go for a mix of skill damage and charge attack. It should work on almost all content, even unreleased ones. Unless KMR decided to give us something weird.

Sample Grid

Grab 2 Abyss Spines, this will be your Ougi specs and HP.

Grab 2 Agonize / Celeste Saber Ater, this will be your Skill supplementals.

Always add Dark Opus and Seraph/Ultima ULB.

The rest? Anything you want.

More HP, More ATK, More Cap Up? you should know the idea by now.