Oh, that would make a big difference, then, if a technique never drops in the first three imprints in a region. I only have more than three from 10 regions, so the majority of the ones I've gained wouldn't even have been rolling for them yet. However, I offer a counter-example: in the mono metal series, I only have two imprints, yet I have the technique for that series: Resonant Severing Line. So maybe it's true that the technique never drops as the *first* imprint in a series at least?