But spending a day on it was kind of overkill. You kind of have to be ready to respond quickly all on your own to such an outrageous email even if to just ask the question "So, let me get this straight, you actually care what's in our son's best interest?". THAT is a conversation opener. She'll spew. She won't like talking about being a bad parent because she already knows she's being a bad parent (way wards are delusional but even they know that texting 1000 texts a week kind of cuts into their parenting time). You didn't do anything other than ask a question and let her convict herself and calmly listen.
You are now detached from fear.
I dont think he took to long, this is training. He will get better as time goes along. Detachment comes at everyone's own speed, those of us that have been at it longer are better at it.
I think sending something he is happy with and not too wordy is a good point to be at, rather than rushing and sending something that she won't even read.