During AOE as DW frost using rune of razorice is it beneficial to swap between targets and keep 5 stacks of Frost Vulnerability on 3-4 targets or even just 2 targets (for example heroic spirit kings or Stone Guards when 2 bosses are out at the same time) while still continuing my rotation and refresh them to 5 stacks when they are about to drop off.
What I would like to know:
Are they both dps loss?
Are they both a dps gain?
Is keeping it up on just 2 (in a heroic spirit kings or Stone Guards style fight) a dps gain but 3-4 (aoe fight) a dps loss?
Is keeping it up on 2 a dps loss but 3-4 a dps gain?