Lindor under Shatkins did
Age 17 - low A
Age 18 - A
Age 19 - High A (373 PA's), AA (91 PA's)
Age 20 - AA (387 PA's), AAA (180 PA's)
Age 21 - AAA, Majors
I could see the number of PA's in the age 19 season being reversed. Like 100 in High A and 370 in AA. Then starting his age 20 season in AAA. I don't know that there is a right or wrong answer...also at some point you have to figure that him and Bichette move at different points.