((P.S. If anyone has advice on how I can call incs and simultaneously survive long enough for help to arrive while 2 geared stealthers are wailing away on me I'd greatly appreciate it, getting knocked face down and having things inserted painfully into mah butt is getting old.))
Nope. There's practically nothing you can do as a sniper if you get jumped. I suppose you can call incs the second you see them, but you'll be dead before help comes anyway.
Also, you do pretty well for yourself in warzones. Definitely someone I focus on LoSing.