The goal is to allow some clients to use most bandwidth as possible available by three WAN
In the past I've used succesfully PCC marking with the "both addresses and port" method
This is known to break HTTPS connections so "dst-port !443" was added to each PCC mangle rule.
Nowadays, almost all connections are HTTPS so very little traffic is managed by PCC rules , the most is passed directly and randomly to single wan.
What solution one has to choose to achieve main goal now, aware that splitting HTTPS connections in multiple gateways goes to break something ?