AS: BDUU to BBAD (respectively)
A2: BDU to AAB (respectively)
It's important to remember that even if your mocks go badly (or you're just lazy like me), you've got lots of time to prepare. Also, when your exams actually come up, you won't be trying to juggle regular homework/coursework with revision - most of your lessons will be almost entirely devoted to revision so you'll definitely have time to sit down with a teacher and target your weaknesses.