For the sake of debate: i would have opted to simply get the dot product to determine what side is forward at the moment of the input and feed that to the buffer system.
Dunno if I’m reading this wrong, but bunch of branches for a single ability reads that there is no buffer? There is also a chance that holding 
/ 
will return true for both 
and either 
/ 
. So in theory with the function above the fireball should work just by holding / + button.