100:1 is for guys who want to get the absolute max power by increasing fuel in mixture instead of oil and are willing to lose some durability because they are likely to blow up or crash the engine first. The 80:1 is a good safety margin. They best oils will minimize carbon deposits, and that decreases cylinder / piston wear. Breaking in an engine too rich may cause excess deposits, too lean causes overheating, too high rpm can cause metal galling at points of close contact. It is all a matter of balance.

I break in my engines by initially running them on the ground just long enough to heat soak (not overheat) all the components, let it cool down completely. Go through this for 4 or 5 cycles. This stabilizes the tolerances as the parts expand and cool. Then I limit high rpm to short busts, ie take off, to avoid overheating. As the engine begins to loosen up, I slowly work up into the higher rpm ranges. Then I finally loose patience and start running it as hard as I want.

I must say that I have never owned a DA engine. I spent years racing 2 and 4 stroke motorcycles in the desert, and this worked for me. I am just sharing my experience, not recommending anything.