I find it a fascinating part of LCN history at least among
The 5 NYC families how they leaned on each other
When putting hits together , business deals etc etc
For example when the 3 Bonnano Captains got rubbed out, I think Gotti's
Crew was a backup team or at least they helped in disposing
Of Big Trin, Phil Lucky etc

But which Families had the best working relationship
Which each other and which Families absolutely could
Not work in tandem?

Gotti and Massino were close.. Gotti helped Massino get back the Bonanno's seat on the Commission after a long absence.

Bonanno and Profaci were close, and linked by marriage (Profaci's niece to Bonanno's son). Bonanno stood up for Profaci when Gambino started "suggesting" that Profaci step off the Commission. After Profaci died, Bonanno conspired with his successor, Joe Magliocco, to whack Gambino and Lucchese.