Since the other thread has pretty much exclusively started talking about offensive tiers, I feel that a different thread is in order. Here is my first suggestion with reasons:
Tier A:
-Pale Green (Magicians mixed with Assyrians provides tons of speed, great stopping power, initiative, staying power, and Magic Charms)
-Egyptians (Very fast, lots of soul generation, stopping power second only to brown).
-Brown (most stopping power, best characters, Haman's Plot)
Tier B:
-Babylonians (Good speed, good stopping power, good characters)
-Demons (Rarely prepared-for, good battle-extention, great characters)
Tier C:
-Pharisees (Fast, some stopping power, few but great characters, NT)
-Heretics (Good stopping power once set up, NT)
-Herods (Best answer to banding, NT)