Extended uphill on highway: when to start acceleration and how fast?

[FLAteam]

My hypermiling habits on the highway usually involves crusing at 47mph on level road and coasting in gear on downhills to induce DFCO until 40mph. At 40mph, I'll begin to slowly accelerate back up to 47mph and repeat the process over again...or should I accelerate quickly to 47mph?

The issue that bothers me occurs when I'm going downhill that turns into a pretty long or steep uphill. It seems to me that if I've limited myself to 47mph, I'm going to be on that uphill section for longer periods of time, thus making the engine work harder and burn more fuel. Should I:

1. continue to accelerate slowly up the hill at 40mph, steadily reaching 47mph to set up for the next downhill coast
2. accelerate swifty right at the bottom of the downhill from 40mph to a speed greater than 47mph uphill to minimize time on the uphill but maximize the time spent coasting downhill
3. start acceleration earlier during a downhill (thus cutting off DFCO earlier) and accelerate to a speed greater than 47mph and continue to accelerate or maintain speed up the hill

I was wondering if anyone had any experience in this. Thanks!