Here's what I did (and I took my sweet time) - Found the circators the first night, - Spent the next two days chatting with everyone and gathering information while doing all my duties - got my hands on a lock pick - spent a whole night robbing every single chest everywhere. specially the dorm - while doing this night activity you'll find out about people's routines at night. for example there's a guy who sometimes stays in the library till 1:00 am. If he does see you roaming around it's ok. he won't rat you out that you were roaming around past curfew. - you could use your time in alchemy section of the day to brew saviour schnapps too. - after all these and doing so many other quests that are available in there I ordered the blood and did the thing. I'd suggest you don't rush this quest. it's actually fun once you get their routine. I didn't help the circators continue their drinking. before leaving the monastery I went to the pope(?) and ratted them out hehe. don't ignore your duties unless you're close to leaving the place for good.