If the second event (simple past) was talked about before the first event (past perfect), can I skip mentioning the second event while I'm mentioning the first event for the first time?

Because I met him in 2011 and he moved here last year, I can assume that he at least had lived in some other city from 2011 to 2012 (before he moved here).

Can I omit the parenthesis and still be using past perfect correctly, or should I just change everything to simple past?

[Talk about events leading up to this sentence in chronological order and say] I know the fact that he lived in A prior to his move to B, which took place last year.

or even

[Talk about events leading up to this sentence in chronological order and say] Prior to this, I know the fact that he had lived in A from 2011 to 2012.

Okay, I'm not sure how to phrase this question, but I want to know if below sentences are correct.

Because I met him in New York in 2011 and he moved here last year, I can assume that he at least had lived in New York from 2011 to 2012 (before he moved here).

In this sentence, should I say "had lived" and omit the "before he moved here" part?

or

Prior to his move, I know he had lived in A from 2011 to 2012.

Or should I just change everything to simple past?

I first met him in New York in 2011 and we became friends. I don't know where he lived before living in New York, but I know the fact that he lived in New York prior to his move to here, which took place in 2012.

This sentence sounds so wordy, so I was wondering if I can just use "had lived" to stress m point that I can assume that he lived in New York before moving "here". I heard a friend use "had lived" but couldn't quite figure out the correct usage.

If the second event (simple past) was talked about before the first event (past perfect), can I skip mentioning the second event while I'm mentioning the first event for the first time?

Because I met him in 2011 and he moved here last year, I can assume that he at least had lived in some other city from year 2011 to 2012 (before he moved here).

Can I omit the parenthesis and still be using past perfect correctly, or should I just change everything to simple past?

[Talk about events leading up to this sentence in chronological order and say] I know the fact that he lived in A prior to his move to B, which took place last year.

If the second event (simple past) was talked about before the first event (past perfect), can I skip mentioning the second event while I'm mentioning the first event for the first time?

Because I met him in 2011 and he moved here last year, I can assume that he at least had lived in some other city from 2011 to 2012 (before he moved here).

Can I omit the parenthesis and still be using past perfect correctly, or should I just change everything to simple past?

[Talk about events leading up to this sentence in chronological order and say] I know the fact that he lived in A prior to his move to B, which took place last year.

or even

[Talk about events leading up to this sentence in chronological order and say] Prior to this, I know the fact that he had lived in A from 2011 to 2012.

If the second event (simple past) was talked about before the first event (past perfect), can I skip mentioning the second event while I'm mentioning the first event for the first time?

Because I met him in 2011 and he moved here last year, I can assume that he at least had lived in some other city from year 2011 to 2012". (before he moved here)

Now, can I omit the parenthesis and still be using past perfect correctly?

Or should I just change everything to simple past?

(talk about events leading up to this sentence in chronological order and say) I know the fact that he lived in A prior to his move to B, which took place last year.

If the second event (simple past) was talked about before the first event (past perfect), can I skip mentioning the second event while I'm mentioning the first event for the first time?

Because I met him in 2011 and he moved here last year, I can assume that he at least had lived in some other city from year 2011 to 2012 (before he moved here).

Can I omit the parenthesis and still be using past perfect correctly, or should I just change everything to simple past?

[Talk about events leading up to this sentence in chronological order and say] I know the fact that he lived in A prior to his move to B, which took place last year.