[Drek]

They have a strange system in Ahgram.

I think I've seen a few WOs on the task masters after I've gotten a good bit of faction, but really Ahgram is no place to grind.

There are however 3 guilds there, where you can get a few WOs that rewards you with 10 faction points per WO.
Be aware that if you pick a hard one you have to abandon you will get -10 faction.

You could instead head across the river to the refugee camp E of Azhams beacon or whatever that place is called, if you want to grind.