I have never taught, and don't use, 70 degree this or that to get into a hold. I turn the shortest way to the outbound heading, and start time. One there I have at least a minute to figure out where I want to go. It's only a matter of deciding which way to turn back to the inbound course. No math or calculation is required.
Moreover, I don't attempt to figure out what kind of entry to use, and don't teach a student to do that either. Whatever looks right for the entry is what gets used. Calculations over.
Mental gymnastics only complicate things in the cockpit. It's rather like flying an NDB approach. One can figure relative bearing and account for wind correction and all other manner of voodoo. However, when all is said and done, one turns toward the pointy end of the needle, and stays pretty much there. If the pointy end moves, you move a little more, and then back some. Problem solved, and it always works. Far less distraction, especially for someone shooting a single pilot approach.
Keep it simple.
Moreover, I don't attempt to figure out what kind of entry to use, and don't teach a student to do that either. Whatever looks right for the entry is what gets used. Calculations over.
Mental gymnastics only complicate things in the cockpit. It's rather like flying an NDB approach. One can figure relative bearing and account for wind correction and all other manner of voodoo. However, when all is said and done, one turns toward the pointy end of the needle, and stays pretty much there. If the pointy end moves, you move a little more, and then back some. Problem solved, and it always works. Far less distraction, especially for someone shooting a single pilot approach.
Keep it simple.