1. If two or more Personal Pronouns to be used, the correct order is: 2nd person, 3rd person, 1st person; means 231; e.g.

a) You and I will go the park. (31)
b) You and he must not accompany me. (23)
c) You, he and I can manage everything. (231)

2. But if anything is related to confession of a wrongdoing like sin, offence, etc, the correct order is: 1st person, 2nd person, 3rd person; means 123; e.g.

a) I and you have to attend the meeting positively. (12)
b) I, you and he have made a serious mistake. (123)