how much should i score in mocks?

Don't. Don't focus on your score in the mocks, instead use them to test out your strategies and increase your attempt rate, accuracy. See it doesn't matter how much you score in mocks because the real exam hits you in the face and all that pride from scoring regular 100+ goes away in an instant. Instead focus on the stuff that will actually help you in the exam, create two or three different strategies, practice executing them, and learn how to deal with pressure when the exam is not going to plan and you have to somehow salvage whatever you can get. Think of mocks as a testing platform, your target during testing shouldn't be being conservative and have the best results, rather making sure everything is airtight and you can deal with anything that is thrown at you. Plus another problem is mocks are not always at the same level as the exams, some are tougher, others easier. In the easier mocks you'll obviously score high, and you won't look at the mistakes you made there and in tougher mocks you'll score low and you won't look at the positives. It's not going to be easy, but do not give too much importance to the scores, just your attempt rate, accuracy and how well you dealt with suffocating situations