Edit: 02/18/2018 The mod currently seems to work just fine online, but might still rarely disconnect the perk deck user from an online server and back to the main menu. The cause of this issue is still unknown but happens infrequently as far as I can tell...
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Have you ever wished that vantage points in stealth missions weren't utterly useless compared to everything else you have at your disposal?

Do you enjoy sitting on a rooftop or cycling through cameras because you realize a dedicated spotter can be just as useful as an experienced sneaker?

Do you love the 'One-hit Wonder' play-style in general?

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GAZER PERK DECK

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The Gazer stealth-sniper perk deck is crafted to provide ample advantage to players perched high up or far away from the objective of a stealth mission, as well as have viable One Down combat capabilities through the final cards with a very give-and-take balance to them.
The Gazer perk deck doubles as both an excellent stealth-sniper perk deck, and a very effective combat-sniper perk deck as well, though obviously with a very limited and specific play-style in order to utilize it to its fullest if you choose combat.

Card 1: "Glorified Spotter"

• -40% armor
  
• +20x mark distance
  
• +125% sniper rifle reload speed
  
• +30% pistol reload speed
  

• +1 additional ECM if the ECM is your primary deployable
  

The first card provides the basics for specializing in the sniper+pistol combo-reliant play-style, but dinking a large chunk of armor as a result while also providing a few stealth-oriented bonuses you would usually have to invest skillpoints into obtaining.
Card 3: "Rooftop Liaison"

• +850% deploy speed
  
• +500% mark duration on highlighted targets
  
• Long-distance camera looping
  

The third card is where the meat of the stealth bonuses the Gazer can provide to his team really shines. The deploy speed allows you to place down an ECM practically instantaneously, allowing a Gazer to bail out his teammates if he hears a camera beeping a little too quick for comfort, as well as give a very noticeable mark duration bonus that guarantees a Gazer is more valuable than a couple of spycam preplanning assets. Long-distance camera looping will also allow the Gazer to loop a camera from any distance away so long as he has line-of-sight of it, which is ideal for looping cameras your teammates cannot reach if they are too high or too far away.
Card 5: "Evasion Training"

• Up to +30% movement speed when below 50% health
  
• Armor slows you -75% as much
  
• +200% weapon swap speed
  

The fifth card gives the Gazer extra mobility and a better means of reacting to an immediate emergency down below. If you're on Murky Station and need to strafe left and right constantly in order to keep as many guards highlighted as possible, the 30% speed bonus comes in very handy so long as you brought a molotov with you to trigger it via self-damage. It also provides a couple speed-related bonuses that are generally more useful in combat situations than stealth, as half way through the perk deck, combat starts to become slowly more and more feasible.
Card 7: "Unhealthy Favoritism"

• -200% reload speed for assault rifles/light machine guns/small machine guns/shotguns
  
• +75% maximum ammo
  
• +100% ammo pick-up amount
  

The seventh card is where sniper-oriented play almost peaks, punishing the use of any other type of weapon (besides special weapons) with a ridiculously slow reload time, almost as if the Gazer has never reloaded those weapons at all before. However the use of a sniper rifle is heavily complimented by double ammo received from ammo boxes, giving most sniper rifles 2 bullets instead of 1 from a single box, and guaranteeing at least one full bullet per-ammo box for the thanatos sniper rifle.

Card 9: "Out Of The Shadows And Intro The Fray"

• No healing besides doctor bags
  
• -90% health upon being revived
  
• Always 0% possible dodge chance
  
• -20% incoming damage
  
• Armor recovers in 0.4 seconds, regardless of damage being taken
  
• +50% additional headshot damage
  
• +10% chance to obtain higher quality item during PAYDAY
  

The ninth and final card of the Gazer perk deck gives full capability to the Gazer in a serious combat situation. It grants the Gazer an incredibly quick armor recovery rate, but balances it by prohibiting any sort of non-doctor bag healing, no dodge chance no matter what bot upgrade or skills you invest in to raise it, and when you are revived, you have essentially no health to work with. The end result is that you can tank damage from a very concentrated damage-source, meaning you can have a staring contest with one, maybe two enemies wielding assault rifles without taking any health damage, at least for a short while, but as more and more bullets begin to hit you, the window where you can take health damage is more and more likely to be exploited. With no means of receiving health without use of a doctor bag, Gazer health becomes exceedingly precious, and can quickly be removed if the Gazer is caught under fire from more than 1-2 enemies at a time. This forces the Gazer to avoid groups of enemies at all costs, because if they do end up letting too many bullets (or even just 2 or 3 bullets on higher difficulties like Death Wish or One Down) slip through their rapid-recovery armor made of plastic, they become immediately less useful, because once a Gazer's health is low, a Gazer's health stays low until they receive help from a doctor bag to reset their health. This last card seals the deal for the Gazer's glass-cannon combat technique. You are incredibly valuable for taking down high-priority targets with lots of health, but if you take too much damage, you are guaranteed to go down again and again and again until you are in custody, or reset your downs entirely with a doctor bag use. Let other teammates soak up damage, and do whatever you can to stay out of the line of fire or things can go downhill for you faster than they can for anyone else on your team.

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Known Issues

• Sticky Features
  

I.E., the Gazer Perk Deck uses a function which increases mark-duration on a target. I know for a fact this feature suffers from 'sticking'. This same function is called upon by the "High Value Target" skill in-game. If you switch from a profile with the Gazer perk deck equipped to one without, but that has High Value Target aced, the mark duration will not be 26 seconds (100% increase) like it should, but will instead be about 18 seconds. Half way from default, half way to the normal behavior of the function, because of the 'stuck-value' I set for it to get stuck on. This is the best I can do to smooth over this issue that PAYDAY 2 has, but to guarantee this issue doesn't occur, you MUST make sure that the last time a 'stick-prone' feature was called upon was by a vanilla function value, not a custom function value. In the example above, you want to unequip Gazer, equip a profile with High Value Target aced, unequip THAT profile, THEN equip whatever else you want. This guarantees the mark-duration will not suffer from 'sticky' functionality. Or just restart your game. That wipes all 'stuck-values' too.
It took a long time to figure out exactly what caused this issue, but it's unfixable on my end, and it's the same issue that all other custom perk decks I have found suffer from, it's just that nobody usually notices, or if they do, they assume it's completely broken, instead of conditionally, temporarily broken.
The best I can offer is this workaround, so to guarantee no sticky features, just make sure to briefly equip a vanilla-perk deck and/or profile that is also used for stealth, and then unequip it to wipe the sticky values altered by a custom perk deck to go back to default.

• Confused Custom Values
  

Similar to the cause of the above issue and it's fix, I have discovered that jumping from a profile with the Gazer perk deck equipped to another profile that also has the Gazer perk deck equipped will result in two known features of the perk deck to not function: mark-duration of 65 seconds, and deploy speed. These will be default instead of the custom values they should be. The workaround for this is simply to equip any other vanilla perk deck first, and then re-equip the Gazer perk deck.
Do not go from a Gazer perk deck profile to another Gazer perk deck profile or this issue will occur. Go from Gazer, to Burglar, to Gazer instead. This can even be done in a pre-heist ready-up screen, not only the main menu so long as you have multiple profiles available with multiple different perk decks on them. This issue is also caused by purchasing the "Hardware Expert - Basic" skill on a profile that currently has Gazer equipped on it, as that skill alters tripmine deploy speed, and thus overwrites the deploy speed custom value for deployables until you un-equip and re-equip the Gazer perk deck (on/with any profile)

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All aspects of the Gazer Perk Deck have been play-tested for balancing, as well as functionality in online servers.
So long as you avoid the above issues and utilize their work arounds if and when necessary, the Gazer Perk Deck is fully functional in both offline and online play, whether or not you are the host of the server. Other players, even if they are hosting, do not need this mod in order for your deck to fully function on their server (unless they have a mod that prohibits or otherwise alters other people's perk decks or blocks custom perk decks from being used) To install this mod, simply extract the contents of the .zip, and place the "Gazer Perk Deck" folder into your "mods" folder in your PAYDAY 2 directory. It is fully functioning with the new BLT 2.1 update, and the perk deck itself costs a total of 17,000 perk points to fully unlock (4000+ of a vanilla perk deck, due to the extensive usability of the Gazer perk deck). Thanks for downloading and let me know what you think or if you've found an issue I don't know about yet.

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Special Thanks:
This mod is without auto-updates, and will require manual updating via the revisiting of this page in order to obtain the newest version of the mod should it ever be updated or modified in the future.