You can often just save scum answers, "best" is subjective. If their les points are too high they lose love, 50-60% is the sweet spot.
To add to that, you can also choose to unren the game so that you can read all the scripts. That way you can read the script and see what the 'best outcomes' are that you can achieve. Sometimes options are not available because say your energy meter is too low (can happen with work, but also with meeting the martial arts master, and some events with the girls as well), or because your stats are too low.
Sometimes the requirements for an event can be rather arcane, so the checking the script can prove enlightening as well. It can also happen (eg. with Lavish) that some of the 'rewards' you get are not displayed (her sleaze points), and checking with the script will at least give you an idea of what some options do beside giving the stated rewards. Sometimes you need the kink points more than the love points, or sometimes doing an event can't even result in an increase in love or kink points (due to already having reached the cap).
Even writing a mod to track all the rewards and penalties accrued from each option would be a difficult ask, since sometimes the consequences are not immediate. So I doubt something like that will happen, at least until the game is fully completed.