Should this be interpreted as "the helmet on your head is a good one" or as "the helmet suits you well"?
can someone explain me the agreement between aohi and bartot? Looks like accusative vs dative/locative to me :-/
You might be right. I think aōhī is plural, while aōhȳ should be the singular of the prepositive locative form for the solar gender.
I am not sure, but maybe in that case ilza would have been preferred over issa