Hmm...”victor” probably isn’t a good choice here, though. I didn’t recognize the ambiguity in the English at first, until I read Dallas’ translation. “Champion” in English can mean “winner” or “defender/fighter for a cause”, and I went with “winner”, but I think Dallas is correct in thinking that Eliezer wanted the “defender” meaning. In that case, make the second line
“nec defensori Dominus”
(propugnatori, as Dallas has it, also has roughly the same meaning (shades up the “fighting” connotation), but ugh, five syllables with a glottal stop; I’d keep it to prose)
Okay, I’ll stop lurking and register, if it will help get a new HPMOR out. Here is my translation:
non est salvatori salvator
neque victori Dominus
nec pater nec mater
modo nihilitas supera
I do have confidence in my translation, which I suppose is a tiny amount of evidence in its favor. The sense is very well preserved, and it has a rhythm that flows well (admittedly subjective). I did not fit it to a classical Latin poetic form such as a hexameter or elegaic couplet; I could do this as well but I doubt I could do it while leaving the sense strictly unchanged.
(note for fellow Latinists: the construction in the first two lines is the dative of possession, which I think is very nice for this metaphorical (as opposed to physical possession) sense of “hath”)