Turbine D;
I don't have the numbers for a CF installation on a 332. The Trent installation on a 333 requires a cruise N1% of 78.1, with a CG of 37% - the chart doesn't provide for corrections but I think your observation of a forward CG requiring a bit higher N1 is sound...certainly it would again be a bit higher at M0.83, and quite a bit less (in terms of fuel flow) at M0.80). Max CLB might be 83-87% N1, MCT might be around 92-94% N1. As a good friend described it, the L/D curve is like a marble on a plate...
My personal experience with the A340 (CFM-56s) was a much higher fuel flow required at M0.83 than M0.82. We could often save 3000kg on a ten-hr flight by bringing the Mach back by .01, (about 8-9kts), with ATC clearance. M0.80 wouldn't normally be filed of course as that's quite slow on either ocean but that's the Turbulence Penetration speed, so used as needed. Perhaps someone here might have those exact numbers for you.