So the Ben. ed. for μέχρι νῦν, with the idea that the action of Eusthathius in currying favour with the Catholics of Amasea and Zela by opposing the Arian bishops occupying those sees, must have taken place before he had quite broken with Basil.  Tillemont (ix. 236) takes νῦν to mean 375.  Amasea and Zela (in Migne erroneously Zeli.  On the name, see Ramsay’s Hist. Geog. Asia M. 260) are both on the Iris.