Are you referring to the Songhai DCL?
That map is brutal. And yes that "building too aggressively" is perhaps the most punishing penalty to playing wide. Your best bet is to find any choke points and block them off to prevent the AI from being able to surround you.
SS piety strat is quite difficult on deity, and I could never get it to work. I either miss the buildings, or get reformed too late and lose SS. Even if you manage to get it, getting past the massive cultures of deity ai is a challenge. I think I only seen it done once.
About that Songhai map, I went 5 city trad and still got Dow from Liz, pretty crazy neighbors. I was only lucky because my city was easily defensible and she made peace easily.