Just to provide a possibility for consideration. The tribes were chosen to send a message, by using the meaning of the names.
The tribes who stand on Mount Gerizim to bless were;
Simeon - the 2nd son - meaning "the Lord heard me" (Gen 29:33)
Levi - the 3rd son - meaning "attached to me" (Gen 29:34)
Judah - the 4th son - meaning "I will praise the Lord" (Gen 29:35)
Issachar - the 9th son - meaning "reward me" (Gen 30:18)
Joseph - the 11th son - meaning "taken away my disgrace, may he add" (Gen 30:23)
Benjamin - the 12th son - meaning "son of my right hand" (Gen 35:18)
They form the message:
The Lord heard me and attached to me. I will praise the Lord who reward me by taken away my disgrace. May he add to me His son at His right hand.
The tribes who stand on Mount Ebal to pronounce curses were;
Reuben - the 1st son - meaning "The Lord has looked on me" (Gen 29:32)
Gad - the 7th son - meaning "good fortune" (Gen 30:11)
Asher - the 8th son - meaning "How happy I am" (Gen 30:13)
Zebulun - the 10th son - meaning "honor" (Gen 30:20)
Dan – the 5th son – meaning “he has vindicated” (Gen 30:6)
Naphtali - the 6th son - meaning "won a great struggle" (Gen 30:8)
They form the message:
The Lord has looked on me. How happy I am for that good fortune, I receive honor that He has vindicated I won a great struggle.