I have IWS installed right now but I did not enable the guards, patrols or civilians extras, I don't know whether to enable all the IWS extras or just use warzones. I get warzones is only for specific areas but how big are the battles? are the extras in IWS battles just as big? and how often are they? if anybody could answer these for me it'd be appareciated!

Use them both, prepare for punishment.