Server Optimization

Hello, I run a vanilla server with paper, grimac, raytraceantixray, and other small plugins. We usually hit a peak of 20 players on at once. When we hit around 18 players, TPS starts to take a dip to ~16-18. What might I be able to do to improve this? https://spark.lucko.me/EZHSTD98JZ Here is a spark report, not sure if anyone would be able to get any useful information out of this. Hoping to figure out what is the main source of any TPS issues. Please let me know if I can provide any additional information.
spark
spark is a performance profiler for Minecraft clients, servers, and proxies.
1 Reply
Chibi Bot Admincraft
📋 Spark profile attached:

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