Horizontal scaling, that is what I am looking for webrtc over sip. Also by giving 1 SIP URI to webrtc client.

Regarding - "Why not do UA -> kamailio 1 -> kamailio 2 or kamailio 3?"

Because I want the UA to be configured to wss which can load-balance to multiple kamailio servers. Avoiding single point of failure.

Appreciate your help.

Any one else with more ideas? Thanks