// USEFUL INFO //
The modpack now has Chunk Pregenerator along the server pack. You can use it to pregenerate worlds. (aka generate chunks around a set radius to save into the world folder and not worry about lagging while generating any kind of dungeon.)
The usage of the mod is very easy, the info on how to use it can be found on the internet. Installing the mod on the client side may also be helpful, although it's not necessary.

// SET THESE IN SERVERS //
In server.properties file, make these changes:
max-tick-time=-1 --> to make structures generate properly and not cause a crash.
enable-command-block=true --> to make structures generate properly.
difficulty=3 --> makes the difficulty Hard.
allow-flight=true --> to stop the server from kicking you for using modded features to fly or hover.
ADD -Dsun.io.serialization.extendedDebugInfo=true AND -Duser.language=en -Duser.country=US TO YOUR SERVER BATCH FILE TO STOP DYNAMIC TREES FROM CRASHING AND STOP FATALLY MISSING REGISTRY ENTRIES FROM SOME LETTER USING ı INSTEAD OF i.

If you can't place or break items on the hunting dimension as an operator, consider using permission mods or go to fxcontrol folder and delete breakevents.json and placeevents.json.