Personally, I don't think speed farming should even be a thing in this game, but maybe that's going to far. Basically, I played a game where you kill waves and waves of trash (Diablo 3) and it got boring. I'm still engaged by Destiny, but at some point, when light is high enough, things will be too easy. Personally, I'd rather have a fire fight that made me seek cover and play more tactically. I can get this from Heroic story by playing alone and basically challenging myself with not getting hit at all. I do not, though, want bullet sponges, either. I think the enemy should just be very difficult to hit, cunning, but once I get a great shot or a few off, it's going down.