It is widely known that phantoms can spawn after 3 sleepless nights. However, the game doesn't actually check for elapsed days but actually for the number of ticks since last slept/death (72000). Therefore, changing the day duration in Time & Wind will throw off the phantom spawning algorithm. On a slow timescale server (i.e. 8h per Minecraft day), phantoms may spawn in the first night and, on a fast timescale server, phantoms will require more sleepless nights to spawn.

It would also be very useful if this mod offered a config option determining the number of sleepless nights required for phantoms to start spawning. I.e. one may want to allow phantom spawns after only 1 or 2 sleepless nights to mimic how people quickly 'break' when not sleeping in real life.