A lot of this is heavily dependent on your abilities and schedule. Nobody can tell you how long to study for each day, for example - we don't know when you're in class, we don't know when you can study, we don't know your tolerance for sitting down and doing additional studying each day after courses end, etc.. I would start with giving us a rough idea of what your next semester will look like and how long you realistically think you'll be able to set aside each day for the DAT and then maybe people can give more specific feedback. Knowing when your winter break begins would also be helpful, since you can dedicate a lot more time during those days for the exam than normal.