How Should One Begin The MCITP:EA / SA ?

MCITP ers,
How should one approach and begin the MCITP:EA / SA ?
what should come first and in sequence after the other ?
How should one approach and begin the MCITP:EA / SA ?
what should come first and in sequence after the other ?
Comments
MCSA:03/08/12/16 MCSE:03s/EA08/Core Infra
CCNA
I did my SA in the following order:
83-640, 70-642, 70-646
and now I am on my EA track I have taken one more the other day which was 70-643.
Will be taking 70-680 followed by the EA exam - 70-647.
However others have been know to do the 70-646 first and work their way back on the MCTS exams.
Tell me more about the 83-640 one.
How many simulations are they ? do they consist of MS snapshots or more router/sim/network type questions ?
Also, are they in a multiple choice format or drag and drop ?
I ain't breaking my NDA's. Go and sit the exam after you have learnt the material. Go through your books, and practice in VM's. DO THE PRACTICE. You will fail otherwise.
I did SA in a similar order. In my experience there is a lot of material overlap between 642 and 646, so I would do 642 before 646. I suspect, but I don't know yet, that there will also be a lot of overlap in the material on 646 and 647, so I'm going to work on 647 now.