Sacrifice outcome

How can you alter the outcoming unit of a sacrifice in the sacrifice pit, without changing the unit shade itself

I would try editing the sacrifice ability to see what you could do. also there is likely to be two versions of the sacrifice ablity one for acolights and one for sacrificial pits.

Well I tried everything even before I posted, its obvious that you can change the input, but the output remains me a mystery

Just skip Sacrifice altogether.

Create a dummy ability that when used picks the nearest Player-owned acolyte and brings it to the base. You could trigger it a multitude of ways, and if you did it would be more predictable.