Mercedes: Critical % vs. Damage/ATK %?

Decent SE is +20% max crit, right?

89% chance of +35%-70% more damage. Multiplier = 1+(0.89*(0.35+0.7)/2) = 1.46725
100% chance of +35%-70% more damage. Multiplier = 1+(1.00*(0.35+0.7)/2) = 1.525

% damage increase = 1.525 / 1.46725 = 1.03935 = +3.94% more damage.

The skill you use it with doesn't matter.

it's 15% more

also, to determine if attk is better, we'd need your attack increases (from pot)

also, gonna throw a question of my own, mercedes %dmg skills, how do they stack with %dmg potential?