[] = true, and should never appear more than once per cast and should only be the very last condition if present.
#showtooltip
/stopcasting
/stopcasting
/cancelaura Aspect of the Turtle
/cast [spec:3,@mouseover,harm,nodead] [spec:3] Muzzle; [@mouseover,harm,nodead] [] Counter Shot
Not sure what you meant by focus part but best guess it’s probably this:
/cast [spec:3,@focus,harm,nodead] [spec:3,@mouseover,harm,nodead] [spec:3] Muzzle; [@focus,harm,nodead] [@mouseover,harm,nodead] [] Counter Shot