I hate changing my action bar from 1 -> 2 all the time to access new skills so I figured out a way to automate it. I know a lot of people (including me) are using "autohotkey" to remove the border from the "windowed mode" since we get direct x errors in full screen.

So I just added a few lines to the script to rebind my Left Windows key to swap to abilities list 2 when I press it down.. and then swap back to abilities list 1 when I release the key.

Here is the relevant data:
LWin::
SendInput {Numpad8}
keywait LWin
return

LWin up::
SendInput {Numpad2}
return

*Note I had to change my "abilities list up/down" to Numpad8/2 since the "Shift Up/down" was causing issues for some reasons.

**Autohotkey does not mess with the game data at all its just rebinding some keys.