For me, the 'new' Shadow Orbs and Empowered Shadows (was it this name?) 10%+mastery dmg on DoTs seem quite boring. Correct me if I'm wrong!
As far as I know, after consumin a Shadow Orb (or more) via MB or MS I will get a flat 10% more dmg on my DoTs, increased by Mastery Rating.
But I wonder if they changed the way the dmg modifiers on spells, since when I heard last, the dmg is calculated when applying the DoT, so for example you would always want to use a trinket before you apply the DoTs. Let's say you have x Spellpower and the trinket adds y to it: use the trinket, cast DoTs with x+y Spellpower and they will tick for the dmg of the increased SP for the full duration, even if the buff effect of the trinket falls of and you are back to only x SP.
Is this the case for the 10%% dmg buff aswell or will the buff be checked and the dmg calculated right before each single tick, so I get a benefit, even if the buff wasnt present when the DoTs hae been casted?