RE: Teaming up for deer?
The technique you describe can work. However, both of you have to play the wind and know what direction the buck will, most likely, come from. He made not come in from the direction you expect him to.
As successful rattling has been for me, during rut, the buck could end up breathing down your collar. Deer can pinpoint the location of a sound from a great distance.
I have done what you described, but the other hunter has been almost beside me. If rattling while on the ground, also bang the ground and rattle the brush, and hang on, Lucy. If you do it right and a buck is totally convinced and is looking to rumble, he can be on you in a flash. I know.