My cost-effectiveness unit

It feels like the grantmaking around me is only partially moneyball-pilled, or it's only somewhat competent at moneyball. There's alpha in putting numbers on stuff, if you can do it right. Five months ago I wanted to compare a bunch of different kinds of donation opportunities. I needed a universal unit of cost-effectiveness, and for that I needed a unit of goodness. Consider a value scale where "EV of the multiverse" is 100 and "EV of the multiverse, in the counterfactual where the Sun goes supernova now" is 0.