Thank you PC, very useful information again.
About your point 2,
The projected energy greatly increases when the number of people increase, that is very true, we may say two people that do not know each other very well may go like squaring the group number.
However, when two people with strong bonds, perhaps lovers, mother-child, best friends focus a projected energy, they yield even better results- much more than two normal people can achieve.
I know that when people with strong bonds are together, their aura is much more healthier, sparky and stronger. Perhaps this is one of the explanations?