i like to think of jae2/shaera as a mirror of the jae1/alysanne king/queen dynamic. both jaehaeryses let ther wives influence politics, but while aly was a feminist whose reforms widely bettered the lives of westerosi women, shaera was sort of a red scare type but for prophecy cultism who had their children marry each other (also like alysanne, but the aerys/rhaella marriage was way worse than baelon/alyssa), while jae2 dabbled mostly in war strategy and made sure he enforced her decisions, unlike jae1 who constantly tried to undermine the women in his family and ther political power