I couldn't get this functionality to work with Keyclone.
I know others have.

I would personally stick with either Target=FocusTarget or Target=TargetTarget (a Focus based or Target based assist system), if staying with KC.

Or alternatively move to another software, my recommendation would be IS Boxer if you're unhappy with KC. It has auto FTL, strong mouse broadcasting, repeater regions for amazing healing, keymaps (very advanced hotkeys) are powerful etc.