talked about this a year ago , there is only 3 solutions to solve this problem
1- add more channels like having a total of 20 channels with 500 each
2- add more mobs in some spots
3- add a special cc floor where u can choose the mobs u want them to spawn time you want to stay in and you pay for this this "flooor" is for u till u leave or time off and iit's oonly u and you'r party who can get in