How Ahri's W works

Could it be possible to make Ahri's W only hit a target as much as needed to kill it? Example: When Ahri Q's a minion wave and all the caster minions die but the melee are all one hit and you use spirit fire and all of them go to one or two when one will kill each. Kinda like how Lucians passive works when cs'ing. I think it'd be nice cause it'll be better for cs'ing and when fighting multiple ppl. If anything make it do that to the minions for better cs'ing maybe not for champs as you'd want to kill one person and they could heal but if all the spirit fire hit them they'd of died still.