Restitution adapted following https://wiki.omnigreg.at/doku.php?id=ant:1799
Omnigreg/Antiph.Synopticum (where Omnigreg tables come from) does not have enough sources there. Plus, the policy is that is the BR text (= the lyrics) is attested in early traditions, we conform to it - we "undo" modifications to the text of BR only if they were made after the Middle Ages. In this instance, this means no "et" before "tu exaltans".