Using clicks and not hotKeys to control the "enslave"?

[Freddie]

But, im totally a "keybinder" guy on my lock, dont use the mouse for nothing...

Then why not do this with the keyboard instead of the mouse? You could define keys that send keystrokes only to the healer (even when the healer is in the background).

and have all possible keys with some action.

You can make more key combinations with custom modifiers. For example, you could define F1 to be a modifier (like a shift key) and define the combination <F1 F2> so it sends F2 to the healer but not the lock.

Or you can use toggles as modifiers. When ScrollLock is on, F2 goes to the healer but not the lock. Etc.