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The comments and answers are helpful. So far, though, it doesn't sound like there's a better solution than the ones I mentioned initially.

What if... we start with a "legitimate" curve set like: image description

... and "drag" the Rating condition (red) curve downwards for better performance like the dotted line: image description

That can be done using a formula which modifies the original curve formula in a way that maintains the original general shape while also maintaining the Rating Condition value (35C) so EER remains the same.

It's a completely artificial manipulation of the original curve set, but seems reasonable for a "baseline" coil. When I mentioned in the original post that I "had some ideas" about how to do this, this curve manipulation is what I had in mind.

Any further thoughts from the UMH community?