I'm paranoid about being seen by drivers during the day also.

I use a day time running lamp. The new cygolite 350 dart is tiny, bright, and has a low profile mount.
https://www.rei.com/product/110176/c...ont-bike-light

In the fall (dark), I'll probably mount it to my helmet and use a brighter light as a secondary light).

I mount my rear light on my chain stays so it lights up the wheel too. your solutions look good too - I like the idea of throwing light on the ground, or anything that isn't so directional.

My bike is also loaded up with 3m reflective tape. I use tapes that match (or accent) the color of the bike, you can't even tell they are there during the day.