2 Sharps almost have no difficulty when handling FP or SC. One of them goes LaR+M14 and the other goes Xbow+HC/DHC; perfect couple.
You're the single sharp there? Rely on demo on your team or switch classes to something more useful, which you could play better. In this case; not sharp.
As for Patriarch, you probably get your gear on and holed up in a enclosed space to face him right? In an enclosed space, Sharpshooter would call for his death by poking the Patriarch in the face. As long as you are in an enclosed space, always take cover and let the pipes or support specialists do their jobs. Preferably on the first attack, by the time he knelt try to throw grenades to possible escape points to clog up his way, then focus fire him. do some supportive shots then take cover immediately again.
When you're free to step out, that's where you should take the opportunity of headshotting him. Trying to score critical hits would only make him focus his anger where in case he charges towards you to melee your *ss to death; no one can stop him from trying it. When you attracted his attention backpedal and drop a grenade on the ground; pray that one of your teammates have the heart or health for defying him again to distract him. You can try to toss a grenade on his body too, blunt damage would make him step back.
note: There are custom weapon servers out there, and as far as I can remember servers have a pretty large sniper rifle called
Barrett M99. Never used it because never felt like needing it. Forcing your ideas through RO2 probably wouldn't work too.
