I had to stop playing yesterday because I'm sorta stuck.
I'm at Montreal & have to get to summon elevator (where there will be more guards coming out of apparently) where there is a turret, two guards & a camera guarding it.
I tried sneaking from the back back & hacking the terminal there, but when you start to hack the terminal, you automatically expose yourself to their line of sight.
I tried shooting them, but they're bullet sponges & killing one guy not only took nearly 30 rounds of rifle ammo, but it usually is enough time for him to hit the alarm. Worse, is the 2 cloakers down the hall will join in the fight.
I didn't have the double takedown aug (this is the first time I seen a use for it) & the way the 2 cloaker guards are positioned in the hall before, it will be impossible to stealth takedown one without the other noticing. When one of them does notice, I can't kill him fast enough for him to shout so that the heavy LMGer in the previous room starts coming. When the heavy LMGer starts coming it's game over.
Before I cloaked, flanked the LMGer & whipped out my shotgun, 11 up close up shots with the shotgun & HE STILL DID NOT DIE!
In fact I was in cover & one of the guys with the regular rifles was walking towards me. I popped out of cover, got the first shot & after a total of 2 shotgun blasts to his face, I'm dead & he kills in a 1.5 seconds out of being in cover.
SHOTGUN = MOST USELESS WEAPON IN THE GAME.
Dying 8 times in basically one room from various trial & error (I'm playing on medium difficulty btw) is not fun.