The Nesira divides between two phases of Hashgacha. Before Nesira, Tikkunim fix the Sephirot, and through them the Partzufim. After the Nesira, Tikkunim are received by the Partzufim, and reach Sephirot through them.
Nesira is a process, not an event. At Yesod, Hod, and Netzach, Nesira takes place at 66.5, and at 67. At Chesed, Din, and Tiferet, Nesira takes place at 506.5. This is where the Atara starts. Before the Nesira, Atara refers specifically to Yesod, and generally to the Sephirot of Zeir Anpin. After Nesira, Atara refers to the upper Partzufim, and in particular to Arich Anpin.
The first Sephira to reach Atara is Yesod, at 66.5 of the center. The Tikkunim of Yesod move to Da’at, on the left side. Next is Hod, at 66.5 of the left. The Tikkunim of Hod move to Imma. Next is Chesed, at 506.5 of the right. The Tikkunim of Chesed move to Malchut, which now has Shlemut. Next is Netzach, at 67 of the right. The Tikkunim of Netzach move to Abba. Next is Tiferet, at 506.5 of the center. The Tikkunim of Tiferet move to Da'at, on the right side. Next is Din/Gevura, at 506.5 of the left. The Tikkunim of Din move to Zeir Anpin, which is now complete.
Malchut can rise after the completion of the Nesira of Yesod, Hod, Netzach and Tiferet, because here is where Malchut is connected, back to back.
