In terms of representing yourself, here's something I'd like you to consider:
I have a good technical business background by virtue of my career field. I had prepared myself to walk into a small court case several years ago. (1) I was factually correct in the matter; (2) I had done my homework and was confident about how I would present myself and layout my facts and claim.
I lost the case. They lied, and misrepresented what had happened. I was entirely unprepared for it because I never contemplated dishonesty as a strategy.
You need to keep in mind that your adversary (insurance company) has attorneys as employees, as well as outside legal help. They have 1 goal....... to justify their fees/salaries by winning, and saving the insurance company more money than if they were not involved working on the matter. You can toss scruples and integrity right out the window, no one gives a damn.
And unlike you and I, they do this EVERY DAY for a living, bro, and the earn a comfortable living because they're successful at it.
I realize we're not talking about a small court case in your matter, but the principles remain the same, because ultimately, you may need to file suit in order to achieve your maximum claim potential. And you don't want to jeopardize that because of a procedural miscue.
You may have a lot on the line here, and I hope you'll reconsider. But I'll stop preaching like I'm your older brother or something
In either event, I wish you the best of luck in the matter.