The person who reported your post summed it up nicely:
If the reason to use it is for target switching and your targets die before you need to reapply then it doesn't fit the reason does it?
Additionally, your profile doesn't work. Fix it when you get back in 3 days or you'll be permanently banned. We do not permit anonymous posting.
I have a question about specs, my guild atm is 2/7 HC and its really close to a third hc kill, at the moment i'm using the traditional spec with Imp. Blood Tap instead of Epidemic, but I see a lot of people with epidemic over Improved Blood tap, specially from Method and Paragon.
Some people say for heavy target switching is better to use epidemic, still I dont see why, since most of the mobs die before you have to apply a second Blood Plague, does it really worth to use epidemic? If it does can you explain and give example of which fights?