All this math, while useful in analyzing what's the best option, might be giving the wrong picture on D&D. If you want to maximize DPR, there's plenty of ways to muchkin it to have the highest numbers. But it depends on if it's in the spirit of the game being ran. True strike works, it doesn't work well but does it need to? Does it need to be a damaging cantrip's equal?
It's really not giving the wrong picture. Red herrings about "munchkin" ways are neither here nor there. True Strike is a bad spell with no purpose.
But I don't want to fix it. I don't even want to see it be good. I just want to see if there's some creative ways, RAW, to have true strike be effective. That it, really.
I mean, many people have asked this question. None have found an answer of anything but "No".
Also, I get that you don't want to do the math, but that's the only possible way we'll ever know if your "creative ways" to make it effective actually are effective, rather than just sounding good.