To be honest, I wouldn't try to place Devils on week 1 on the 2sm4d(3) map. I remember trying twice, and it didn't work.
But on 2sm4d, it's quite easy, in my opinion.
It's better to use Pirates, Cerberuses, and Imps with a Stronghold on week 1; they'll consistently succeed, rather than trying to place Devils on this map in week 1.
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