This build is also incredibly fun, but insanely mana intensive. When you are spec'd destruction you are supposed to be a glass cannon and this is the glass cannon build. You give up health and superior health stones in exchange for more instant cast shadowbolts and some drain life and further casting dots.
This build is also used only in battlegrounds. However, in AV you will be very high on the top kill lists for your team. Casting corruptions and draining life to gain the nightfall buff - shooting off your instant shadowbolts and getting huge crits, all while conflaging and shadowburning as well as tossing in a shadowfury every little while.
