Depends on the map. How weapons handle, gamemode the amount of sat-coms being used etc.
So I can't tell yet
Personally I think its way too hard to stay invisible, and off the radar, I mean if I want to snipe and don't want to appear on radars or thermal scopes, it takes 6 of my 8 perk points, that's not taking away a gun, and if i want to be invisible to kill streaks to, then I am kinda SOL because I will have to use all 8 Perk points. And another thing is why cant the suppressors also eliminate muzzle flash, I mean if we really want to be invisible as a sniper should be then it would only make sense, Also lets hope they don't make stalker able to delay explosives like claymores or bouncing betties, because we already have a limited amount of them and scavenger wont refill them, so it kinda unbalances the sniper against runners, I mean it takes out them once, then you have to rely on your secondary to beat a smg the next time they come around, which is usually with a ton of flashbangs, noobtubes, and c4.
Mine will probably be:
Off The Grid
and then either Scavenger or Tac Resist.
Scavenger will depend on how many bullets you start with and how many it takes to kill people.
Here is a video of what they do and the new points for some of the perks. About 4-5 perks got an increase in points.