The following summarizes the characteristics, advantages and disadvantages of all star-rated doctors:
1 star doctor: Task-based doctor, unskilled and proficient, with the lowest upper limit of measurements, used for the task of brushing measurements (10 minute can be trained once).
Two-star doctor: Muggle doctor, skilled in single disease, with low upper limit of circumference (training can be done once every 30 minutes, and one-star doctor can be used for training tasks, but two-star doctor is useless)
Three-star doctor: the strongest doctor in the early stage, proficient in individual skills, with a medium upper limit of circumference (1 hour can be trained once, and the training time is relatively medium, and the average circumference of 140 can be obtained in a short time in the early stage, which is very helpful for the early development).
4-star doctor: a doctor who specializes in many things and whose upper circumference is above the average level (training once every 3 hours, training time is too long, and you can't get the best attributes after full circumference, so give up)
Five-star doctor: the strongest doctor in the later stage, with dual skills, one expert is proficient, and the highest degree of coverage (you will know why it is called the later stage when you train once every 8 hours, and you don't have to pursue too many legendary doctors in the early stage, but you can be promoted once every three or two hours).
Looking at the above data, we can see that it is best for Samsung doctors to upgrade in the early stage, and the proficiency of single skills is completely sufficient, mainly because the training time is friendly and the 5-star doctors can't run. The farm is good in the early stage, and you can buy 5 more stars in the later stage!