Loukianos 5 and Domitianos 3 were both urged by Theodore the Stoudite (Theodoros 15) in one of his sermons to consider how they will guide the monks entrusted by Theodoros 15 to their care (βλέπε τοίνυν, πῶς προηγεῖσαι τῶν ἀδελφῶν σου καὶ τέκνων μου): Theod. Stud., Catech. Magna II 58 (p. 412 Papadopoulos-Kerameus). The sermon was addressed to the monks of the two monasteries of Hagios Christophoros and Sakkoudion and the order of the names implies that Loukianos 5 was hegoumenos of Hagios Christophoros and Domitianos 3 of Sakkoudion.

Loukianos 5 is also recorded in another sermon of Theodoros 15; the monk Dometianos 2 is urged to be the soul-mate (σύμψυχος) of his leading fellow-monk, Loukianos 5: Theod. Stud., Catech. Magna II 70 (p. 491 Papadopoulos-Kerameus). Since Loukianos 5 was the hegoumenos of the monastery of Hagios Christophoros, Dometianos 2 was perhaps his second in command (perhaps the deutereuon of the monastery).

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