Paper 1.13.2 Surival Server Optimizations

Hello, I currently run a large survival network with my most popular server hitting 90 players at times. For survival, it’s been extremely hard to properly scale things in order to run smoothly with the player counts we hit. I have done everything I can as far as configuration changes within plugins and the server software itself. I am in desperate need of someone that is capable of optimizing our server software in order to run at at least 18 TPS with 90 players on. Parallelization has been recommended to me several times, which I think would help tremendously considering we have enough threads to do so. Our main issue is entities as you can tell from these timings:

If anybody is capable of doing this for us, I am willing to pay a good amount of money. Please message me on Discord: Circuscow#3286. Thank you!