Doton on Bosses, am i missing something?

[Naryoril]

You forgot to count The potency from DOT

What do you mean? The effect description of Doton on the Lodstone is this:

Creates a patch of corrupted earth, dealing damage with a potency of 45 to any enemies who enter.
Duration: 24s
Additional Effect: Heavy +40%

According to this, Doton has contrary to many other skills with dot effects no initial damage, only the dot portion. Afaik dots tick every 3 seconds, which makes 6 ticks at 45 potency, so 270 potency in total per enemy inside Doton for its whole duration.