What are your goals? To unlock sniper rifles or to unlock the recon class?
If it's just to unlock the recon class, grab an all-kit carbine and go to down. That's usually what I'm doing except I'm running around with the DBV-12 reading the endless rage of people crying about shotguns being noob weapons.
If you're trying to unlock sniper rifles... uh, well, I would say play the heck out of them back when the 100% exp bonus was working and it'd make unlocking them rather trivial (which is what I managed to do). Otherwise, suck it up buttercup and expect to have some truly awful games while you learn the engagement ranges you can engage at and shouldn't engage at.
I prefer to be mobile so I stuck with the 8x and tried to pick 60-200m ranges and just counter sniped places where I knew other people would likely be camping. Hills on the edge of Rogue Transmission, mini islands and roofs on Paracel Storm, roofs and side hills on Zavod 311 and Lancang Dam.