Wouldn't "S/He is my mighty/powerful master" be acceptable?
Based off the original tips and notes from lesson 1, yes that should be acceptable.
This would normally be written "Ñuha kostōba āeksio issa" with a slightly different intonation as well.
So does this mean Master as in "kill the masters" (slave master) or more Lord as in "The lord of winterfell?"
Does not the possessive pronoun come after the noun?
What's the difference between aeksia and aeksio?
I believe one is female one is male respectively