Danse Macabre question

Hi,

it says, that the next skill does 75% more damage.

What is with a skill, that does no damage.
Is the effect nullified or does it count for the next skill, that does damage?
DT: mobility->concealment->Death Trap.

Concealment gives you a DM proc because it’s Subterfuge skill so DT would get damage multiplier in that rotation

Dash > Concealment would just refresh the buff