I don't think middling totals is a good strategy. You only get once chance to hit your middle.....unlike a side middle where it can move back and forth. Also middles on large numbers seem less likely to hit...a 3-5 middle is more likely to hit than say 28-30 middle.
Absolutely.
This is the first time I've looked at middling totals, but I think four points is profitable long term if you can get it. I may very well be wrong though.