I make a tall tower with spikes lined up. At the top there is an extra ceiling on the front kind of looks like this ( =_=) each person will stand on the = and the _ is a open space with spikes under it.
Basically you have a narrow way of fighting someone with a chainsaw lol. If you fall trying to stay on the platform you fall into a pit of spikes
Build a base put loot inside make if really hard to raid and whoever raids it can have the loot inside. Spawn in a kraken and have people find and kill it
Fill a dodo up with some prizes and throw it into someone's base every couple of hours when they're not expecting it. If they're lucky they'll see it and get the rewards