If we have a nic on a pc that has access to both LAN (1 Gbit)  and to ADSL (10 mbit) through it, what speed value should we set to cake?

The vast majority of packets would be from the internet, not LAN but we want to optimize both sides if possible.

Should I switch to fq_codel/fq _pie instead? 

Router uses cake for ADSL packets, so no problem there hopefully.

In a follow up question what TCP congestion algorithm is recommended with cake ?

Cubic, bbr or bbrv2?

Thanks!