Well...
theoretically you would do as many aways as possible; however, the reality of it is that you should do as many aways that you can realistically complete with 110% effort.
doing an away is quite strenuous for the obvious reasons and it can be difficult to keep the same level of intensity after 2 or 3 away rotations.
One needs to be mindful of the fact that while you doing >3 aways will increase your matching odds, if you are not able to maintain the same intensity through every single rotation, you may actually hurt your chances.
I have heard of people doing 2 aways and a 3rd-two week rotation, and i've also heard of people doing 3 or 4 rotations. The decision is up to you.
I think doing 2 or 3 (at most) is ideal and will allow you to better direct your efforts.
hope that helps
OG2008