Just a little noob question about the practice tool: Can I change the defensive stats of a practice dummy in anyway?

I want to use the practice dummy as a way of testing how much damage certain builds do against certain champions. For example, if I was playing Vladimir, and I wanted to see how much damage I would do with my full combo against a Lux with 30 MR, I could change the amount of MR the practice dummy has to see how much my all in would do against a Lux.