Fffff. I can breathe again. Sgail SASO done. And without cheating (aka watching youtube videos or reading guides)
It was easier than I believed at first. I mean, at first it seemed super hard. Only a small area of the entire map allow for the normal suit, the targets couldn't be attracted to that area and instead loiter in the higher security one, and none of the 6 mission stories could be done without disguises. And guards everywhere. In the end thanks to using a much closer spawn point that allows for the normal suit, the tower roof, was doable. It would have been a pain in the ass if you had to do it from the initial entrance.
Starting in the tower, crossing the bridge, there is an empty room, an antechamber to the ark showroom, the first target crosses it from time to time. Dropping one weapon (taken from one of the two guards that watches the tower entrance over the bridge) distracted her private bodyguard, knocked him out when he went to store the weapon, waited until she repeats the patrol loop alone, then a bullet or a syringe kills the first target.
I didn't know how to enter the main building without being seen, which is why in the end I went down using a drain pipe. I was near the stone circle used for the Janus wake. Knocked a guard in the grass to have a bit more of breathing room. Finally I noticed the second target goes through here, too, so I planted a second weapon that distracted her bodyguard, attracted her below the jail you can break, and baam, accident.
I guess most people did something similar, or is there other ways?