Better go with their plan to start and see how she bends. Every plan has a recipe that takes into account taper rate, profile, and other aspects.
After you get it profiled to plan, you can adjust from there before you put finish on.
I don't like mine to bend in the fades too hard, so I use .003 total lam taper and start side tapers about 2" past fade of riser ,after you sand the "corner" off that is there, it looks fine.