Lucidstuck II

What we're lacking now though is a stealthkill melee weapon - like a string to subdue guards or a knife to backstab them(unless that's included in the multitool)

choke them with the hookshot rope. not the most efficient way, but it saves a slot.

I would also suggest(if possible) carrying around an EMP charge that would disable all such devices in a radius - that is, of course, only if we're going by video game logic of a compact enough device like this existing at all and being efficient.

the problem is that once such a device is used, the guards go on high alert. explosives have a similar effect, but you can use them to for example blast down a wall for a quick escape or take out multiple guards, while EMP only takes out electronics.
the spy multitool should be able to take out cameras and sensors in a far more focused way that does not instantly give away that someone broke in.

Although we could attempt a "pacifist" run, the problem here is that we only have one shot at this. With that in mind, I feel like we'll pretty much have to kill at least one of the guards to acquire a disguise Hitman style, which will drastically increase our chances.

this is just a game by daydream that will likely have little to no impact on anything else. unless we do something insane like disembowel everyone we come across, it shouldnt matter how many we kill.