I'd say dead silence. Only because I don't need it AT ALL unless I'm playing SnD. Who wants a perk for 1 game mode? Ridiculous.

Blast shield is useless especially pro version

i think every perk has its advantage. it just depends on what game mode your playing. alot are saying recon, but i cant tell you how many times its helped me get an extra kill in s&d :p

Recon
Blast Shield
Overkill

IMO, those are the 3 most useless perks in the game.

Actually, Extreme Conditioning is useful for SnD if you do the weapon swap glitch to run for a longer time and get to the enemy spawn faster.

And Blast shield has saved me plenty of times in FFA when I am in route for a MOAB and I kill a guy that goes into dead man's hand right in front of me.

Survive DMH

Good when you're on MOAB streaks or playing tactically.

recon is by far not useless espacially if you have a full party thats using it. Espacially the pro version is interesting even if you only scratched some 1 with a bullet he is painted on the map and can be easy picked off by your team.
I go for overkill and blast shield. You want overkill? Kill a enemy and replace your secondary with his gun. And blast shield doesnt help you out that much.

Extreme Conditioning since you don't run faster nor do you run unlimited.



Sitrep Pro is very good. Makes sound whoring easier and added bonus of seeing enemy equipment.



LMAO, you need Recon Pro then. Everything you do to the enemy makes them an arrow on the map at least 3 seconds and if they don't have Dead Silence Pro 6 seconds. Any shot, flash bang, explosive makes them a arrow on the mini map like Advanced UAV except Assassin users can be seen.

If you have at least 2-3 people using this on your team, it is easy mode. It would be useless only in Hardcore modes. Also it can't be countered not even by Assassin users. I swear if more people used it, it would be considered OP. It is one of the most underrated perks in COD history I'd say. Whenever I face a team full of Assassin users or campers, instead of coming on line to bitch, I slap on Recon Pro and they are powerless

I play kill confirmed in full parties and with my volume kinda low. So for me it is not useful.