degen I remember us having similiar issues, brightness related and cramping eye muscles. Maybe you want to give the OnePlus 3 a try, with Paranoid Android 7.3.1 ROM. I use the phone for two years now every day, multiple hours. It's much better for me than the BenQ EW monitors. No such thing as writing emails in a hurry. I have to use it at ~25% brightness to avoid PWM, but surprisingly with this screen the brightness although high is not much of an issue. The screen gets darker and more yellow over time due to the AMOLED burn-out effect. Maybe the typical used device by now is in such a yellow state, too -> less blue light.
Must-do for me:
- Paranoid Android 7.3.1
- Chrome as browser
- Brightness out of PWM range (65/255)
- no brightness and color-changing f.lux-like overlay apps, they make the screen unbearable