In BNW, Assyria can be problematic because with the early war mongering with siege towers, you may get multiple DOWs. If your placement is in the "corner" of the map, it's not a huge deal. What I don't like is being attacked on two or three fronts. When I start conquering that early it's not uncommon to get two or three civs declare war at the same time. My favorite war civ is Arabia. You get desert folklore and you'll never want for faith, and you can be peaceful until camel archers, then...run over everyone. Camel archers can't be stopped. You MIGHT have to have arties for the final civ, if there are some pinch points or mountainous terrain that slows you down. Just remember to keep two or three horsemen around to take the cities once their down to zero.