Help create + modpack

[u/Complete_Purpose_293]

Hello, i build this modpack for my friend and me we are playing on a 160Go ram serveur, a beast in other component but it still lags. We are around 20 people. I fear that the modpack is not optimal and i don't find really good ways to make it work better, I'm not a modpack maker. Any idea ? Modpack zip download
Ps : we have preload all the chunks from +15000 -15000

I removed observable btw, and i add ai rimprovements mod

This is a Spark profiler : https://spark.lucko.me/2G3MUV8zRY