Here is where I disagree a little bit.
I think it's a good idea to take AAMC 3 and 4 and possibly even 5 early in the timeline.
Why? Because these tests are not as representative as the newer mcat as the later exams BUT they still help you get a feel for the 'real deal' and see how your study methods are working.
I think that accessory tests such as tpr's, tbr's, gs', kap's, etc play a good role in supplementary practice, but you should take atleast 1 test a week in the beginning and then ramp it up.
If you're doing 2 months of content review and 1 month of practice, then I think that AAMC 3 and 4 should be done in that time period of content review with AAMC 3 done about 3 weeks into studying and AAMC 4 done about 7 weeks into studying.
The other exams should be taken during weeks when these aren't. You're still left with 6 aamc's in a 4 week period in addition to any other passages/practice exams you haven't done.
Just my thoughts...