Ok so I already did the Dawnguard quest with everything while the beta was going. I am now doing a vampire run through. My question is, why was the vampire drain attack as a vampire lord all powerful when I first started and now it takes forever to kill anything with it? After I got the lord power I went and killed a bunch of stuff to help get that achievement for the 11 perks. I was 1-2 hitting everything and now it literally takes like 10-20 hits. What am I missing?

P.S. My buddy is having the same problem, while my other buddy is not.

If serana is following you then yur attack does almost NOTHING, so kick the Teenage whiner to the curb and THEN go on your undead bad@ssery spree