That is not needed, nor possible, the way this macro works is based on talents, so if you are using the AOE talent loadout - need set the default verstion to AOE. Sames goes for ST, if you using the ST talent loadout - need to set the deafult version to ST.
Both changes need a /reload before they can work properly
What I suggest you doing is this, set all to ST and use the ST loadout, as it is Voidweaver, it’ll work both ways, really nice single target and pretty decent aoe, good for both situations. I’m doing that right now =)