How can I optimize the sponge even better, there for example disable the world from another mod
You can find all Sponge config options that include some optimisations that you may like.
<root>/configuration/sponge/If you care to peruse the SpongeDocs, you will discover all manner of useful information.
https://docs.spongepowered.org/stable/en/server/management/performance-tweaks.html