How to Beat First Ahab Fight
You need at least one sinner with pierce-resist, but the more the better. Have them redirect the mark and eat the one-sided attacks without dying. You can probably only do it once per sinner, so make it count.
Use Meursault’s base EGO on the mark turn to drop the amount of unopposed damage she deals next turn.
Use IDs and/or EGOs that inflict next turn paralyze. For IDs you can consider sunshower heath, seven yi sang, grip faust. For EGO there’s faust’s telepole.
That’s about it. Kill starbucks first, and then just facetank ahab while you murder qq.