If you feel bad about the imperative (grammatically, whatever you add “please” or “I beg you” after, is also imperative), you can use the conjunctive. But even the Our Father is full of imperatives.
Also known as the jussive subjunctive.
Deus benedicat X, Y, Zque
“May God bless…”
Otherwise, I myself prefer the *Nunc Dimittis *and its antiphon, from the post-conciliar compline:
*Ant. Salva nos, Domine, vigilantes, custodi nos dormientes, ut vigilemus cum Christo et requiescamus in pace.
(Lc ii, 29-32)
Nunc dimittis servum tuum, Domine, secundum verbum tuum in pace,
quia viderunt oculi mei salutare tuum,
quod parasti ante faciem omnium populorum,
lumen ad revelationem gentium et gloriam plebis tuae Israel.*
Ant. Protect us, Lord, as we stay awake, watch over us as we sleep, that awake we may keep watch with Christ and asleep rest in his peace.
(Lk 2:29-32)
Lord, now, you let your servant go in peace,
your word has been fulfilled,
for my own eyes have seen the salvation
which you have prepared in the sight of every people,
a light to reveal you to the nations,
and the glory of your people, Israel.
tee