Maybe it’s the level - you’ll deal more damage if the level is higher

But isn't the damage off, I did practically the same on playstation. While I didn't have the 100% compendium I had literally everything else and I was on hard, doing I think around the same damage your doing just with no 1-hit KO. Now I might be wrong since I haven't played in like a year (on playstation) but I remember reaper farming on hard where-as it took multiple hits to kill.

@NizzBizz It's on merciless. Enter the fight with a persona that has auto buffs and debuffs, and equip the auto concentrate accessory. With almighty amp + almighty boost + magic ability and 100% compendium damage boost it would be ~10x the normal damage without boost

I'm pretty sure this is on easy my guy, any shadow going up against Myriad Truths even on normal probably is gonna get one shot.