I don't buy the "million times worse," at least not if we talk about the relevant E(s-risk moral value) / E(x-risk moral value) rather than the irrelevant E(s-risk moral value / x-risk moral value). See this post by Carl and this post by Brian. I think that responsible use of moral uncertainty will tend to push you away from this kind of fanatical view

I agree that if you are million-to-1 then you should be predominantly concerned with s-risk, I think they are somewhat improbable/intractable but not that improbable+intractable. I'd guess the probability is ~100x lower, and the available object-level interventions are perhaps 10x less effective. The particular scenarios discussed here seem unlikely to lead to optimized suffering, only "conflict" and "???" really make any sense to me. Even on the negative utilitarian view, it seems like you shouldn't care about anything other than optimized suffering.

The best object-level intervention I can think of is reducing our civilization's expected vulnerability to extortion, which seems poorly-leveraged relative to alignment because it is much less time-sensitive (unless we fail at alignment and so end up committing to a particular and probably mistaken decision-theoretic perspective). From the perspective of s-riskers, it's possible that spreading strong emotional commitments to extortion-resistance (e.g. along the lines of UDT or this heuristic) looks somewhat better than spreading concern for suffering.

The meta-level intervention of "think about s-risk and understand it better / look for new interventions" seems much more attractive than any object-level interventions we yet know, and probably worth investing some resources in even if you take a more normal suffering vs. pleasure tradeoff. If this is the best intervention and is much more likely to be implemented by people who endorse suffering-focused ethical views, it may be the strongest incentive to spread suffering-focused views. I think that higher adoption of suffering-focused views is relatively bad for people with a more traditional suffering vs. pleasure tradeoff, so this is something I'd like to avoid (especially given that suffering-focused ethics seems to somehow be connected with distrust of philosophical deliberation). Ironically, that gives some extra reason for conventional EAs to think about s-risk, so that the suffering-focused EAs have less incentive to focus on value-spreading. This also seems like an attractive compromise more broadly: we all spend a bit of time thinking about s-risk reduction and taking the low-hanging fruit, and suffering-focused EAs do less stuff that tends to lead to the destruction of the world. (Though here the non-s-riskers should also err on the side of extortion-resistance, e.g. trading with the position of rational non-extorting s-riskers rather than whatever views/plans the s-riskers happen to have.)

An obvious first question is whether the existence of suffering-hating civilizations on balance increases s-risk (mostly by introducing game-theoretic incentives) or decreases s-risk (by exerting their influence to prevent suffering, esp. via acausal trade). If the latter, then x-risk and s-risk reduction may end up being aligned. If the former, then at best the s-riskers are indifferent to survival and need to resort to more speculative interventions. Interestingly, in this case it may also be counterproductive for s-riskers to expand their influence or acquire resources. My guess is that mature suffering-hating civilizations reduce s-risk, since immature suffering-hating civilizations probably provide a significant part of the game-theoretic incentive yet have almost no influence, and sane suffering-hating civilizations will provide minimal additional incentives to create suffering. But I haven't thought about this issue very much.