I've had many "best" team situations, far too many to count and even remember.
The worst was at a place that talked a big "team game" but allowed cliques to form (even encouraged it) and that meant it was, I'm fact, completely fractured, toxic and untenable as far as a place to work for me. I left.
That sounds like the correct ratio to have XD
My brain is struggling to comprehend a place that encourages cliques, like why would you do that.
I know, it was terrible and the issues started at the very top with no regard to dealing with th obvious and damaging cliques. At the first work event, my wife was pulled aside by two of the other wives and warned about it. When she told me I talked it away not believing it but sure enough, there it was. I wasn't there long, just under 12 months.
Yay for the forewarning and being able to escape quickly! O_O