"Asmodeus's instructions to me are a medium-hard no on a Goka trip, and Hell's instructions imply that's because there's a divine noninterference zone centered on Ostenso; if we take Keltham outside that zone, it's possible Abadar or Iomedae could sic Osirion or Lastwall directly on him. For the rest, I'll get it done if those are my orders."
"I register that after Keltham's interpretation of his Vision of Hell spell, I myself considered faking a Zon-Kuthon attack on this project, a smaller one, and not with a god-war starting afterwards. I rejected that plan without checking it with you," back when you were not my boss, "because at Keltham's Intelligence level I expected him to be suspicious of us having fed him exactly what he'd said he suspected. If we throw too many distractions at him, he may start thinking that he's in a game we're controlling." (Maillol isn't being a good Bayesian per se, he hasn't reviewed the Probability lecture, he is just an experienced project manager suspicious of Complications.)
"Opinions on specific proposals: The emissaries seem safe enough to fake, it seems like something alterCheliax would do and Keltham has no way of checking anything he sees. Scrying trip to Absalom sounds shaky, too much we're not rigorously controlling that could go wrong on us, but if you think that'll reassure Keltham, it might be worth it. Attempting to infiltrate the grounds - that makes him think this location is not secure, got known somehow, he maybe starts watching other people more closely if he thinks they might be infiltrators, requests a 'Glimpse of Beyond' spell to check. Again, might be worth it if that sense of insecurity is what you think we want. Clarity on goals and reasons would help me design an exact infiltration incident to your purpose."
"My original plan for keeping Keltham distracted, if that became necessary, was having girls dogpile him with overtures, and for them to fake interpersonal difficulties with him and each other as needed."