I have no idea how snipers deal with this tbh. I still play shotguns 95% of the time (but I start to feel my LDR/Spear), so a lot of the things I deal with (melee damage not registering, shotgun range being inconsistent, random bursts of damage out of nowhere, players not being on the radar or teleporting around), might not impact snipers? I just know that snipers still Headshot me, even when everyone is lagging.