Alchemist Code POTK 2 Raid: Giant Armored Eldritch

3 Million damage on manual with a risky setup. The boss's reactive deal a lot of damage especially on higher laps, and Dorothea J+ with her slash ATK down is generally advised to have an easier run when your chronos run up and whack the boss for jewels.
In this case i'm subbing out Dorothea for Carla with Necro main and Zerker sub, for 25 more fire res down but with 25 less Slash ATK down.
I relied more on Kaya's Blind to reduce the damage from the reactive, but this is dependent on RNG since blind has a 20% chance to proc.
This is not a perfect run, one shotting the boss is definitely possible, but you would be better off just getting a guild mate to finish it up instead.