Hello. Thank you for help. Will you please answer a few more questions?

1) Which preposition is correct in the context: "your help at the most difficult moments in / of my life"?
2) Is it grammatically correct to say "God-blessed person" or "God's chosen people"?
3) Does the phrase "friendship loyalty" mean "loyalty to friends"?
Thank you for your time and attention.

1. I would choose "in".

2. "God's chosen people" is better than the first one. The first phrasing is quite awkward.
3. "friendship loyalty" is comprised of 2 nouns. I think "loyalty to friends" is much better, both grammatically and in making the meaning clear immediately.