He was not using his KC as much he should've due to having it under a modifier macro. Now it is a separate skill and he can track that. I also I advised him to get tellmewhen to track his spells.
I believe in giving people time to improve and learn (there are exception to this ofc). As the same chance was given to me in start of T11. And as he seemed to understand what I said and seemed willing to learn, then I can believe that he will do better.