since they increased duration of vampire buff by 10 sec on 25 man mode it seems we get 50 seconds more before 7 people become mc
1st person has 10 more sec, 2 people have 10 more sec, 4 people have 10 more sec, 8 people have 10 more sec, 16 people have 10 more sec, then 7 people are mc and 18 people have 10 more sec (if u dont wipe from mc that is) so assuming you wont make it through 7 people getting mc for the full time it will be an extra 50 sec worth of dps to kill her.
for 10 man version it will be 1 more minute before most of raid is mc and definitly a wipe if she isnt basically dead by then.
10 man has 15 more sec added to vampire buff so 1st person has 15 sec, 2 people have 15 sec, 4 people have 15 sec more, 8 people have 15 sec more, then a raid wipe 6 people get mc which adds to 1 minute.
what annoys me is that they put this fix in the middle of the week after she was difficult dps burn. yeah i know its only normal but still 2 more t10 tokens lost