Running two parties through the mansion attack, added more to it, more foes, four groups of adventurers working for Jamandi (two parties of pcs). Picked the areas of the Stolen Lands they would each seek to chart and tame, haggled a good deal for hexploration, celebrated, and went to sleep (one pc group immediately fled, getting out before the attack).
Tartuccio poisoned an npc party, killing them in their sleep. Once the attack got going we had some wild combat, but the aftermath was notable. The other party found a secret door, picked a lock, and got into Jamandi's war/planning room. Of course they stole all of her intelligence (Rostlandi war plans, some on espionage, nearby factions, some of what they are trying to find in the stolen lands), and looted their employer thoroughly, with some good rolls for loot (electrum scroll cases, coin rewards for mapping and hex clearing).
They headed through only some of the mansion, found the guardroom, looted that and managed to break out through the barred windows into the night, later summoning the guards to assist while they departed. Didn't solve the puzzles, didn't help Jamandi.
I find this hilarious, and it does look like the attackers stole the intelligence and escaped. Opening Jamandi up for blackmail and ruining her plans if Brevoy ever got a hold of it.
Tartuccio as well is fine and hasn't been exposed. He is embedded in another adventuring group. The party had some hints on what he was doing and that he was using magic during the celebration, but didn't investigate it well enough to ascertain the poisoning.
I like Tartuccio as a competent assassin, and chuckle at the thought of Jamandi killing that party if she ever finds out what they did to her office.