Scripter Mode

So I was watching Lcs the other day and the commentators were talking about the one game bjergsen had to lane against a scripting xerath on stream and how he said he somewhat likes leaning against them to test his reactions and all that. Personally I would really enjoy a practice tool against bots that were pro/scripter levels. A challenging game mode that if it goes bad you don't tilt and flame or lose elo. Have it set up like a normal custom game where you control how many there are and you can invite people. I feel it would improve people's reaction times and has potential to make players a little better in the dodging aspect to be reactive instead of trying to predict.