Battle royale is a very specific game mode. The maps that used in this mode have key spots, where the battles take place. It is not correct, because rounds are going too fast. This map can solve this problem.
Losttown has a lot of gameplay options. It is 4096x4096 units map, where each place is involved.
It has ~2500-4000 wpoly that can lag in low spec computers. Enjoy!