infernal blow, multistrike and pulverise need of explanation

So. Before it was easy : ruthless did the ruthless explosion depending on last/first hit and the way debuff proced.

Is multistrike going to work the same ? Meaning if the 6th blow was the one with 99% more damage, and the debuff expires, the debuff explosion counts as 99% more ? And/or if you One shot the monster, or the monster dies before 6 stcks, it's the first blow (meaning multistrike will be bad for this skill) ?

Also, there is now a new "tag" in pulverise: melee AREA damage. How will this apply? Only to the debuff release is my guess, so won't work for the "weapon hit" nor the %life explosion.

Can Mark or someone confirm or explain ?