It really does depend on your army and hero. If you are a mage, Phantom is not nearly as strong since, starting early mid-game, your phantom does not have a chance of surviving even one round while Fear will still lock stacks down for four regardless of how big those stacks are.
For the fighter types, it won't be nearly as good since your phantoms CAN survive a lot of punishment and you can only cast 1 Fear per round.
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