I followed pretty closely to what I usually played. However, I was able to get all the choices that concerned me without having to do a full paragon or renegade. You cannot use save editor on the Xbox one.
I didn't want to bump this so I'll just do an edit. I plan to buy all the DLC maybe that will help. I know in PC i can use a save editor, but fuck it. I originally played the games the first time on PC, but I prefer the console versions. I don't know if the choices require me to have 100% of a reputation. I usually have majority Paragon and 25% - 50% Renegade. I assume it has to do with how much Paragon/Renegade I have. Or when Miranda and Jack fight and I can't make be neutral because of the grayed choices. I assume these choices make Tali loyal while not making her exiled and not revealing her father's secrets. In Tali's loyalty mission in ME2 where the renegade and paragon choices are grayed out.