I would suggest that you are on the right track. Perhaps a couple suggestions....
As to phone calls, she should make it clear that all calls will be recorded. She can accomplish this by writing him a letter to that effect, keeping a copy for her records, and/or by stating at the beginning of at least the first call that all calls will be recorded. It would also be prudent to then record ALL calls. If she only records some, he could argue that he thought she stopped recording or that she only records the "good" calls. To avoid these problems, just record them all.
When I have a client that has communication issues with the other parent, I always suggest email. In emails, people will generally be more civil. First, there isn't a "conversation" in the truest sense so it tends to be more calm. Second, knowing that it is easy to print out the emails, the parties will tend to be a bit more polite. So, when possible, she might want to consider email as a form of communication.
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