A limited set of actions can assigned via macro commands. Incompatible actions are ommited from the generated macro. Also note that Macros are limited to 15 lines each.
This hotbar is pulled from Gingergaming's channel and is used for myself with some modifications to remove macro usage.
No new buttons.
This layout is meant to be used with any sort of MMO mouse that has 12 buttons on the side. I chose 4x3 bars so that the layout represents the button layout on my mouse.
Bar 1 encompasses your single-target rotation. I was aiming for as little thumb
Hail JoCat