I should point out that the comments that I made above are general propositions and not applicable to all batters in a broad brush sense.
For instance, in the amateur game for many under the age of 15-16, it's not all that unusual to find the slower bats and lower quality hitters in the lower range of the batting order. Thus, careful attention to the off-speed stuff facing slower bats has to be weighed carefully. On the other hand, some batters love the hard stuff, so heat with these batters can be hit a greater percentage of the time. As for location, some batters will take a posture in the box that just begs for a sinker or high and inside and so on.
And yet here's another proposition for conversation - let the batter make a less than quality hit. In other words, pitches with a high percentage of results for a pop-up, fly out to the field, grounders 1-2-6-3, double play and other scenarios are also part of the what-to-pitch-and-when.
In essence, my original comments were meant to set the table for tweaking detail situations, befitting a moment in time.