Grid Graph Optimization

Hello, I have Isometric grid pathfinding.
I have 500 npcs in the game (I cant decrease npc count / cant destroy them).
Controlling the movement of 500 NPCs tires the server. (Game is online)
How can I optimize NPC movements? There is my current settings:
image

Hi

Check the unity profiler first to see what part is actually slowing things down.
The AILerp script is already the fastest movement script in the package. The FollowerEntity is also pretty fast (in that is runs pretty quickly, but it does a lot more work, it just spreads it over tons of threads).