Cast ground targetting abilities on target location

Hi, can you add a macro command that lets us cast ground effect abilities on target's location? Targeting with gamepad is clunky and even using mouse targeting wastes time unnecessarily.

It very simple to do:

/ac "Shadow Flare" <t> <groundtarget>
If enemy is targeted, it places Shadow Flare beneath the enemy. If a player is targeted, it places Shadow Flare beneath the player.

90% of the time you want the ground ability to be cast beneath specific target.