> 2. Use ";" as a hyper key. By holding it down and pressing another key, I can switch between specific programs without cycling. I can also use hjkl as arrow keys.

Did you overload the ;-key, meaning it sends ; when pressed fast, and acts as modifier when hold and pressed with other keys? Is'nt that kidna painful to use and inflicts false input occasionaly?

I too have some personal modifier-keys. I remaped Pause-key to the Right alt-key, and use for persional settings in apps. And I remapped the left Alt-key to F22, and use it for window managing and staring/raising apps.

Benefit with this is that both keys are exclusively used by me and the pause-key is also available even when my setting is not available.