Debilitating Belief Gained!
So this is basically what the Spirit Talkers got, with their belief that the lowlands were cursed? And so not only Sacred War procced, but their beliefs compelled them to continue attacking, for basically no gain...
So, options.
For the upgrades, the only two contenders are the Admin upgrade and the Construction upgrade. These are random, so they're probably not greatly connected to our actions this past turn. Nonetheless, the roll is probably weighted toward things that make sense as a consequence of our past actions. I don't quite know what the Admin tech is weighted towards, but I believe I can guess that the Construction tech would be weighted towards things that empower our ability to construct canals and other water-tight pathways. Though, the March is making some noise again, which I take as a sign that we're heading into that crisis soon. As in, a turn or so from now. Thus, the Admin tech is more likely to help with our short-term problems.
Our next leader is taken as Magwyn, in a landslide, which is a good thing. Integrating the March would take strong Admin, though her Poor Martial works against us if our measures fail and we are faced with a civil war.
Our refugee option is more a question of what Stability we think we need for the coming turns than the Econ, I think. The maximum hits (-3 to -5) gives the greatest Econ, as well as possible tech transfer opportunities, in exchange for effectively mandating Main Restore Order for the next turn or two, if we're lucky. Since I think addressing the March problem would likely take Stability hits, I'd rather minimize the hit and difficulty of integrating foreign peoples for this option.
Now, Grand Sacrifice vs New Trails. While the vote for Sacrifice tries to shore up Stability (where were you people when we were spending Stability like water during the Tax Crisis and earlier?), narratively I believe, in conjunction with our new taboo against metal, this option would result in people destroying their metal tools. Since the Copper Mine gave us 3 Econ, and Grand Sacrifice costs 3 Econ, it makes a sort of mechanical sense. New Trails, on the other hand, is an attempt to take advantage of our slightly below limit Centralization to spread land routes to our northern provinces to make progress toward the March problem. Narratively, I think I'd like to take this action next turn, so to take advantage of Magwyna's Heroic Admin, but that's still an option if we make a New Province next turn, so.
[X] Random Admin tech upgrade
[X] Magwyna (-1 Stability, other effects, [Poor Martial, Heroic Admin and Diplo])
[X] New Trails (-1 Econ, +1 Diplo, +1 Centralization, other effects)
[X] Take in some (Chance of stability loss, +2 Econ)