Standard practice is what works most effectively for the individual. One way I found good is to start mind mapping about 2/3 into my activation time. So if I'm activating for 30 minutes I start mind mapping after 20 minutes.
I also swap between analograffiti and ABC method from the memory Optimizer course.
Whatever method you start with may not be what you ultimately do mostly it is really best to keep a flexible attitude and trust your instinct as to when you are going to start mind mapping. I've done complete activation 2 or 4 passes without mind mapping just creating a summary ABC list and sentence or two. It also depend on your purpose too.
Alex
