*** at your own risk, but in case you mean Svchosts, Default sets way too many- Imo.
~as to why it is useful to split in the first place
-Increased Security by providing additional inter-service isolation
-Increased Scalability by allowing per-service settings and privileges
-Improved Resource Management through per-service CPU, I/O and memory management and increase clear telemetry (report CPU, I/O and network usage per service).
Running 16 Gb - i'm a rebel, ii mine set to 8388608, results in 15 svchosts. Less overall idle usage, more free threads is all i personally care about.
If you meant processing; Process Lasso, CPU cores, or disabling Core 0 affinity on games also comes to mind