Help with Server Lag

Any tips on reducing my server lag?

https://spark.lucko.me/wbOV8VwmwI

This is running FTB Academy on a docker container allocated 2 cores / 8 gb ram. The majority of the issue seems to be in the updateEntity() from what I see. What do I do about this? Go for a better CPU for my docker container? Or limit entities? Something else?
spark is a performance profiler for Minecraft clients, servers, and proxies.
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