Do you know how much load LISA can sustain.
You can have a look at this: https://techdocs.broadcom.com/us/en/ca-enterprise-software/devops/devtest-solutions/10-6/installing/installing-and-configuring-devtest-server/post-installation/sample-performance-benchmarks-for-basic-service-virtualization.html
The load LISA can sustain is only limited by the resources of the system on which the VSE is running. So these are some good practices:
Many of the above and more are also mentioned in above documentation.