Demonic Strategies for Claustrophobia
My experience from playing both sides is that the Demons win more often than not.

For the demon player:


Try to always have two troglodyte packs on the board, ideally from two sides, two packs of 3 troglodytes is very hard on the humans.  Keep them replenished, only power them up (ravenous, etc.) for sure hits or to position in front or behind.
Attack the human with the lowest armor, if equal then attack human with most wounds, if equal then attack redeemer
Event cards are very much worth it, grab them whenever you can
The big demon usually isn't needed to win.  Troglodyte swarms are great on their own.