There is no doubt that more people who are focused on the same task will come up with a more powerful solution than when you try to figure it out on your own.
But it must be a group of people who come together to give first and then receive.
Also, the regular meetings of the group and the discipline of the participant make the difference.
You are coming together for one purpose, not to socialize but to support and to be supported.
the optimal size of the group is 6 and there are three roles to fill: the note taker, the timekeeper and the facilitator sometimes. The participants take turns in those roles.
Check out the mastermind opportunities.
The mastermind idea was mentioned by
Napoleon Hill in the book Think and Grow Rich and also by Jack Boland who took the mastermind tool and modified it for his work.