You are asking about Mother Meera.
Even though it is a very good idea to be able to join forces and be able to get our Message to more people through her, it would not work as you imagined. This is because she is very much managed by her family and the people closest to her. It is a stage act – she is very loving and kind but she is not running her group of followers, much the same as (Y) was being run by his Adepts in the early days.
This is what happens to a lot of figureheads, think of Ching Hai. So with this in mind, these family members are not going to allow her to make an alliance because they would then lose control.
They haven’t got the Lightwave Energy, she can take people so far but not to the level of Light and Sound available to you. It would be great to be able to infiltrate the group and give the Light and Sound to them.
As for writing to her. You could try (N), it wouldn’t do any harm, but as things stand at the moment the chances are she wouldn’t even receive the letter.