So Sarenrae's in on it too? Or no, Keltham said he was trying not to think about Cayden's plans, so that means he doesn't consider himself to be working directly with Cayden -

She can see the outlines of the two pieces she's missing, the two pieces that'd make everything else fit together, maybe just one piece but definitely not more than two. One is what outcome Cayden Cailean and Nethys are angling for and why only they are working towards it. The other is why Cheliax hasn't attacked Osirion yet. 

So Sarenrae's in on it too? Or no, Keltham said he was trying not to think about Cayden's plans, so that means he doesn't consider himself to be working directly with Cayden -

She can see the outlines of the two pieces she's missing, the two pieces that'd make everything else fit together, maybe just one piece but definitely not more than two. One is what outcome Cayden Cailean and Nethys are angling for and why only they are working towards it. The other is why Cheliax hasn't attacked Osirion yet and - she's pretty sure this has the same answer - why Keltham changed course to work with the Church of Sarenrae and the Padishah Empire when she sold her soul.