Originally Posted by
Brusalk
You mean a buff that has a 4 second duration but similar RPPM to a trinket that has a 20 second buff will have less uptime? /gasp
Being more serious, Demo benefits tremendously from 4 seconds of 100% crit because you can get Dooms up in that period of time that will crit for their full duration. Those dooms in turn give you more imps than you would otherwise (which by itself vastly overcompensates for any damage loss from not putting up doom with mastery/int buffs. Those imps in turn also generate more fury.
Destro has some gaming involved because 100% crit can increase chaos bolt damage, as well as grant more embers by way of getting guarenteed emberbits off of immolate.
Affliction benefits from it a lot, because in 4 seconds they can apply all of their dots which is the majority of their damage. (Though MG/DS ticks don't benefit, sadly)