The best way I think when collaborating with another director is to block the show before rehearsals begin (or each scene before each rehearsal), so that it's set in stone. Note down the blocking that you have agreed upon, and this will be verbatim to what will happen on stage.

If you have the problem where the other director tries to "dominate" the decisions, then divide the scenes in half between yourselves so that one person will direct this scene and the other direct the next scene. Therefore,  the "head director" on their allotted half and the other will act as a sort of advisor, giving general suggestions and helping to make sure that continuity runs from their scenes to your

That way, the other director won't be in a situation of making you feel passive by dominating the rehearsal. The other overbearing director will be satisfied by directing her share of the scenes and you can still have a fair go as director.

Hope I could help. Tell us how your show goes.

The most efficient response I can give at this point is:

I agree 100% with everything Tristan has said on this thread.

 

[Edited because I initially wrote "10%" above, and while I often agree 10% with Tristan, this time he's nailed it  )

Originally posted by POB14 I often agree 10% with Tristan

sigh.
you sound like my actors