Recently come to my attention is Varfolomeev Maksim (2016) ” Some Peculiarities of the Liturgical Dialogues Before Anaphora and Communion in the “Testament of Our Lord” “, Vestnik Pravoslavnogo Sviato-Tikhonovskogo gumanitarnogo universiteta. Seriia I : Bogoslovie. Filosofiia. Religiovedenie, 2016, vol. 66, pp. 9-23 (in Russian).
The article may be found here, with a link to a pdf. I admit that my reading has been entirely through the medium of Google translate, for which reason I refrain from a detailed discussion. The author argues (to my mind reasonably) that the “Sancta sanctis” in the opening dialogue of the anaphora of Testamentum Domini is an element in the euchological tradition (it seems to me a forming consensus that anaphoras are built of smaller prior units) and that it serves in this context to place the worship of the church into a communion with the worship of the church in heaven. As such a liturgical Sanctus is not required.
This approach is much to be preferred to that of Gabriele Winkler, “Über das christliche Erbe Henochs und einige Probleme des Testamentum Domini” Oriens Christianus 93 (2009), 201-247, at 246, for whom the appearance of the Sancta sanctis in this position is “unsinnig.”
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