I was on 13 2 weeks ago, from 27 kills (4+11+12), and it was the most in our guild. And then, last week, I've got 1 from the whole raid. And I have 4 bosses killed in this lockout currently, still no drop. So, 13 from 27 and then 1 from 16. Or even 24 vs. 19, because IIRC I go my 13th Secret from Animus.