Dishonored - Lady Boyle's Last Party: G/CH/MFaS All Runes/Bone Charms/Coins on Very Hard

The guests outside (with the party invitation that blows off) don't seem to be there if you approach from another area. I didn't test to see whether they appeared inside the mansion with all the other guests, so that's a possibility. In any case, going in to get their pouches also affords you the opportunity to save some time grabbing a coin on the outside balcony of the apartment with all the weepers. Assuming that those guests don't appear inside the mansion if you skip them, there are 19 pouches to pickpocket at the party totaling up to 950 coins. Something worthy of note, each Lady Boyle has their own bedroom and the upstairs is somewhat randomized. I'm not totally sure, but I believe that the Dunwall Tower Skeleton Key and the painting of the Royal Spymaster will appear in the room of the Lady Boyle that is the target (along with the note). It might not be the case that those two things follow the note, but it makes sense in the context of the story. It's also very easy to forget the painting of the Royal Spymaster since it changes rooms. The Dunwall Tower Skeleton Key should always be with some of other loot, so you probably won't miss that. The other things that are easy to forget are sextant, hemlock essence and statue on the ground level. I made probably 6 attempts wherein I forgot to grab one of these items or the upstairs painting.