I'm intrigued by this idea of a divine murder mystery, and there were some great details - the way the body was both hidden and revealed, the pot of urine (odd but made sense, funny to me but something the believers could take seriously - was this from a real life cult or did you come up with it yourself?).
Most of my thoughts on this were around the characters, so I'll split them up that way.
First up Mahau. I liked how the section started, using the descriptive scene of the setting to demonstrate something of his personality. But after that I lost interest in him. He seemed more like a modern human than a god of vengeance. Things like his commentary on worshippers as currency just didn't feel like the mindset of a vengeful, awe-inspiring divinity. Making comment on this within the story was good, but I'm not sure why it comes from him.
I really liked Arlon. Or rather, I loved to hate him. The guy's clearly a tool, but he's a hugely entertaining tool, kind of like I imagine many Norse gods to be. To me, he had the strongest personality, and showed the arrogance, insensitivity and indifference I expect from a mythological deity. Really enjoyed him.
I wanted to like Neda, and think I might have done if I'd read this from the start, but in this section she mostly just seemed grumpy. The intolerance within that fitted a priestess of vengeance, but I think I needed to like her first, so that I'd feel sympathetic. Like I say, probably works if you've read earlier chapters. But I also didn't buy in to how casually she was treating and thinking about the gods. She's dedicated her life to worship - shouldn't she feel a sense of awe and grandeur at working with two deities, including one she worships? And where's her confidence in the god she's dedicated her life to? For a lifetime believer, she didn't always have high expectations of him. Having her attitude turn casual through the story would be an interesting arc, but didn't feel right to me for an early chapter.
I had a similar view on the pope's behaviour, especially the things he said. He's the high priest of a temple, and now these outside gods are intruding right to the heart of the inner sanctum - where's the arrogance? Where's the outrage? Where's the assumption that his god must be doing things right? After all, he believes enough to dedicate his life to this guy, surely he won't quickly accept that he's anything other than awesome? It seemed at times that you were heading that way, but more of it could have made some really entertaining conflict, and if he doesn't view things that way I would want to know why.
Overall, I I didn't believe in this as a scene between powerful gods and their high priests, not because it was badly written but because of what I saw of their personalities. I like the plot and am interested in how the characters deal with each other. Especially Arlon - the more I think about it, the more he's my favourite.
Hope that helps.
PS When they found the sock in the bed my mind immediately leapt to inappropriate jokes about teenage boys and crusty socks. Then I went 'no, not that sort of story'. But then after that I went 'wait, isn't that something Arlon might joke about?'