I dont particularly enjoy using the ff macro system for battle content because they can get janky with wait times and what not. That said I do something similar to this. If you have a program to make keyboard macro's out of game (for me razer synapse) you can create a macro that puts the shadow flare down where your cursor is (I also use this for mch turrets).

That said if there is a way to make a macro like you want in game (might be doable, not sure), Im not sure it would be terribly beneficial. Certain fights you might want to place it pre-pull so no target. Also if there is a fight break and you know where they coming back, same thing.