Sandy ,
Sometimes it is better when there is so many blatant mistakes and misinformation - it is simple for the atty to point out that the IME dr was very mistaken and possible confused on who's report he was writing...
Your dr & atty just have to have the proof to show to point tout those mistakes.
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But there are 2 main things that must be proven for a wc case.
{well maybe 3 =costs & future costs}

This is just my summary though for what it's worth

1- That the injury/s was/were caused at or during work time and during time of employment with said employer.

2- The injury itself must be proved and any aggravating or long term factors or treatments.

my state has rulings and case info on the state site- it's kind of interesting to browse those- might be a way to see what atty is getting the most wins.. I didn't think of that before.