Sequence of split sleeper berth.

You are in violation of the hours of service rules with that combination. 8/2 would constitute a 10 hour break. But then another 2 hr break after a 2 hr break would only be 4 hours and would be in violation. Your next break would have to be 10 hours.
Any two consecutive period's must equal 10 hours or more to be legal.

 

IMO the Split Sleeper is good for one-day situations to arrive on time (maybe 2 hours earlier than otherwise) for an appointment. But for multi-day loads, it's not a huge benefit unless you just like running that way.

In theory you can save a half hour per "day" If, and only if, you wrap up your 30 minute DOT break inside the 2 hour break, but if you're not doing that, the split sleeper is not helping you any [across multiple days].

Best way to "gain time" on longer, multi-day trips is to be rolling immediately after 10 hours and not breaking longer than 10

 

Split sleeper is not going to magically get you from point A to point B any faster, other than like I said, maybe a half hour per day could be gained IF you keep breaks to exactly 2 and 8 hours, AND put your 2 towards the middle of your work period so as to avoid needing a 30 minute break. But do what you want.

 

I used split sleeper as a crutch when a shipper or receiver held me up long enough to make it useful.

 

This is why most drivers should avoid split breaks or only do it when they plan to do it, not start doing it out of desperation. The chances of screwing up and then having a big violation are pretty certain unless you know what you are doing. IMO