Focus macro help

So, I’m trying to make a macro that targets the focus target when available with scatter shot “nomod” and chimaeral sting “shift” but will fire upon normal target when no focus is available. Is this possible?

#showtooltip
/cast [mod:shift,known:356719,@focus,harm,nodead] [mod:shift,known:356719] Chimaeral Sting; [@focus,harm,nodead] [] Scatter Shot

pure genius