Well, if I had known half-elves were ok... *chuckles*
Question. At 4th, the ranger gets a spell (if you have a wisdom bonus). Would "Hide From Animals" work against demons? Are they of animal intelligence or classified as an animal in that regrd? The only other useful 1st level spell in the ranger list is Alarm and Keep Watch, but not sure either of those would work with your magic system.
BTW, made a minor alteration to the character to pick up Warding, but as it's not a class skill... don't expect much.
I don't want all of you to be good at warding, which is why only warders get that as a class skill. Makes it more survival horrory when only one or two of you are even capable of defending yourselves.
For example. The warder in the gang should have the ward circle pre-made in the form of wooden planks tied together with rope and lacquered with the wards. With that thing, even a moron can set it up properly and protect themselves from the demons. But if there is even the slightest misalignment during the night, or one of you steps on it, the ward will be disabled on that location and demons can get in.
Also environmental factors are a huge problem. Too much wind could mean that a leaf or something could fall onto a ward plate and disable it. A rabbit or wildlife could run through the ward and kick one of the plates out of alignment. Getting mud on any of them is a sure way to kill yourselves.
That is all assuming that you have the ward circle. Without it, you have to draw the wards on the dirt to survive the night, and those things could can be disabled even more easily. The only people whom can do that with confidence is warders, as the rest of you are fuuuuuucked.
Basically you should all be kissing the warders ass once you get out into the open. If the ward circle breaks or catches on fire or gets lost, he is the only one that can save you. The ranger is slightly less worthless out on the open, since game in this world is spectacularly rare since the demons kill them easily. Mostly birds and rabbit and other small critters if you are lucky, as there will be plenty of dire predators out there that are strong enough to survive the night without hiding.
Demons also collect themselves in areas where they know victims are going to be traveling. So roads are just one long dinner buffet for demons, since they've caught on to where humans could be and rise from the core at those locations. Out in the deep wilds their numbers are way down since there isn't anything to murder out in the middle of nowhere.