Originally Posted by
Dracodraco
Of course - but the question then becomes, is it *best* to make that trade-off on your DK? If stacking mastery causes a lot of overhealing, there's also the option of having healers throw dots/their few heavy hitting spells (EG, Lava burst for resto shaman) and easily making up the 4K dps that the DK could gain by doing so (if not even more) - the globals saved because your DK doesn't need the extra healing.
Likewise, healers doing this has the option to go fully defensive at a moments notice, mid fight, if the situation warrants it - for example, if a healer dies, or there's periods where healing is a snooze fest (think fel lord - healing outside of the heavy handed phases is largely non-existant, but inside the phases, shit gets rough). A DK stacking multistrike vs mastery doesn't have the option to suddenly go more defensive (apart from popping CDs, of course) like a healer throwing out dots/heavy hitting spells would.
This is all just guesswork and theoretical anyhow though, but it would seem to me that it would make far more sense to have your healers throw out a global on a DoT every 20 seconds to make up for the 4K dps is a better choise than making yourself "squishier" than needed, atleast from a progress PoV.