AuraPlayer with Load Balancer Follow

A Load balancer may be placed in 2 relevant locations in an AuraPlayer architecture.

Load Balancer between Users and ServiceManager servers

In this case the Load Balancer distributes the load between the ServiceManager servers.
The Load Balancer should be configured with Sticky IP, especially if partial playback is used.

Load Balancer between ServiceManager server and Forms servers

In this case the Load Balancer distributes the load between the Forms servers.
There is no stickiness requirement, since the ServiceManager uses the same continuous Forms connection for a sequence of partial services.

Summary

For the best results, you may setup Load Balancers at both variants simultaneously.
This will guarantee load distribution on Service Manager servers as well as on Forms servers.