Has anyone come across a tikkun for a spouse during a separation?
Repentance, Prayer, Charity and Forgiveness can do a lot.
Practically R. Arush's books "Garden of Emuna" and "Garden of Peace" speak a lot about it. May be also in "Womens' Wisdom".
Author writes explicit in very strong words, that "Garden of Peace" is intended for men only and "Womens' Wisdom" is intended for women only.
Excepts from the books can be found on the website http://breslev.co.il.