I personally think it's good to move onto mocks once you're familiar/comfortable with all the subtests and associated question types. I also recommend doing mini-quizzes/mini-mocks if you have access to those. I agree with Smelly Boy above in that you should attempt to split it up evenly so that you can actually look over what went good/bad and improve. I guess with timed/untimed, just do untimed till you're comfortable to move onto timed. Ideally, most of your practice should be spent on timed practice because this is where the exam's main difficulty factor stems from.
EDIT: different people take different amounts of time to learn the techniques and apply them, so move on when you feel comfortable doing so, but make sure most of your time is spent practising questions in timed conditions.