Have you considered using the berries that lower EVs? They can be useful if you need to readjust EVs.
The berries in question and which stat they lower is as follows: Pomeg (HP), Kelpsy (Attack), Qualot (Defense), Hondew (Sp. Attack), Grepa (Sp. Defense) and Tamato (Speed).
Since you asked this question in the 6th Gen section, Reset Bags in Super Training could also be helpful if you want to reset everything and work up from there.