A large portion of relevant modules/templates have now been switched to cargo. Various usages of SMW throughout the wiki need to be replaced by the new functions, in particular item tables. If some pages do not show up but contain no errors, please null-edit them. To see how you can help with the port check out Path_of_Exile_Wiki:To-do_list/SMW_migration (and leave a comment on the talk page if you have questions).
Sovereignty is a notable passive skill that grants reduced mana reservation for skills. It also grants increased effect magnitude for auras cast by the character. It's located in the outskirts templar's section of the skill tree