-of all the lawful evil bullshit-
Okay.
Blog post.
First off: The GCP staffer in question is apparently the sort of person who sees no problem in taking statements entirely out of context to the point of being half-true at most, so take that into account.
Specific points: Gods are not the kind of being you can physically fight. Neither are, say, faeries. This came up only when the staffer brought up the idea of attempting to physically fight them instead of talking with them, which does work; it's part of what clerics are for. That's why he was having the conversation in the first place, to prepare for talking to Fharlanghn about what policies the GCP could take that he'd find acceptable. He's still confident that he can come up with something Fharlanghn will approve of that will keep the people of this world safe from rogue daeva, though of course that's going to be more complicated if the GCP won't work with them on it.
He knows less about the god of the dead and her feelings on his world's afterlife system in particular, but it is widely held to be better than ceasing to exist - yes, even hell. If someone wants to cease to exist anyway that can probably be arranged - such a spell may already exist, others that affect what happens to souls when they die do, but if it does there's not enough call for it that it's common. He'll prioritize finding out about it when he gets access to his world again. He expects that once there are more clerics in the world it will be possible for anyone who wants something like that to find someone to cast it for free; Pelor's clerics in particular regularly do charity like that. It's also possible to learn ahead of time which afterlife someone will go to, and in some cases to positively affect it. (He adds those spells to his list; the detection spell is in almost the cheapest tier of spell he has, and can take quite a large batch of people in each casting; Atonement is upper-mid and is only available to people expecting to die soon, for whom it's an emergency spell.)
He does expect that daeva will be able to become spellcasters, and, yes, experienced spellcasters can cross between planes, in his world. This takes several years to learn to do, under fairly ideal conditions. He only just today became aware of the existential risk that this poses, but existential risks tend to get the gods' attention very quickly; he's confident that they will have it taken care of before it becomes an actual issue. He will post to the blog as he knows more, which probably won't be until Fharlanghn has arranged for transportation between the worlds.
Dogwood gets a chunk of hazard pay - relatively modest, but with a note that there will be more once Raafi is sure this won't affect his income too much - and the blog post to look over before it's posted, in case there's anything there that's a bad idea in light of all the comments he hasn't read.