Segula from the אר''י הקדוש to save one self during a מגפה to be said on Rosh Chodesh

The Sefer Pri Etz Chaim brings a special segula from the Ari Hakadosh to be said on Rosh Chodesh specifically during a magaifa or pandemic. It should be said after each of the tefilos of rosh chodesh. To say עלינו לשבח 4 times each time forwards and backwards and between each round you say pesukim of אנא בכח see below followed by על כן נקוה once and kapitel ז'  of Tehillim. It is based on kabala a reason given that Yehoshua ben nun composed the tefila of Aleinu and he brought the walls of Yericho down with this tefilla reciting it 7 times.