Hawkmoon hands down for PvP. It has amazing range and most of the time I outgun people trying to snipe me and at close range it still hits like a shotgun if you get a lucky bullet. As for PvE Fatebringer is a no brainer. It does arc damage and having enemies combust after a precision kill is great. Damages any enemies nearby therefore less health on them. Plus the huge increase in reload speed is fantastic when you're in a sticky situation.