I see a couple options:
RoofIf we go the roof route, Ichante can levitate people into position. Per
this post, the hospital is surrounded by lightly wooded hills. Ichante didn't see any watchers, spirits, or dual-natured paracritters that might notice the glow of a spell. If we go at night, it should be dark enough to avoid detection by the guards on the ground, especially if there's no moonlight due to the rain. Ichante can navigate via her natural thermo vision. She'll pop some psyche to deal with the sustaining penalties. An air spirit can add Concealment while also using Movement to speed up the process. We'll lift-off from the top of a nearby hill and float our way over above the guards' sight lines.
This is a pretty good approach but we still need to figure out how to get from the passenger elevator to the service elevator. Ichante could cast Physical Mask to make us look like guards if the walk between the two is short, or she could use Trid Phantasm to make it look like nobody is there if is really is just a short dash.
Pros: quiet, subtle, bypasses guards on ground
Cons: cold, wet, lightning, team is separated
SewersThis hasn't been discussed because it's disgusting but there's a possibility of going in through the sewers. Eddie stopped at a door with a key hole in it. A key hole suggests it can be picked. Eddie is quite excellent at picking locks, so that might be a way in. If it doesn't work, I would say that we could force it but collectively we are wet noodles physically. Perhaps Ichante can summon a guardian spirit to do it, or to just pop over to the other side and open it for us.
The advantages of this approach is that it's even more out-of-sight than the levitating approach, plus it gets us directly into the sub-basement without worrying about service elevators. The cons are we don't know what to expect on the other side of the doors, either in terms of decaying bodies or security. The voices Eddie overheard said, "Gonna be a
few days before this gets cleaned up and the next one comes in" [emphasis added], which suggests that there won't be activity while we're down there.
Pros: even more subtle, bypasses guards, gets us directly into the sub-basement, team can stay together
Cons: cold, wet, gross
Thoughts?