Most people say Rey fits in any team which is another word for there isn't a team built for her because other Resistance sucks. And that she's not a must have for any team and most teams work without her. She just hits hard. And if you have her 6 star, 7 star wont make her much stronger. Upgrading her gear would make bigger difference than extra star. Only reason for getting her to 7 star would be for heroic raid.