Just a further question to the one put forth by KittyCatty, can you use "on" and "nous" in the same paragraph meaning the same group of people? If I don't use "on" I'll end up with a lot of "nous"s all over the place, so I'm hoping the answer is yes!!
Moderator note: multiple discussions merged to create this one. See also the following related threads
FR: On / Nous - generalities
FR: on / nous - in formal essay or academic writing
FR: on (plural) + participle, adjective, reflexive pronoun agreement