Simple queues and IPv6 traffic priority

Trying to prioritise traffic for specific lan hosts using simple queues.
My attempts are failing due to target lan hosts ipv6 addresses changing frequently.
Queues work fine for ipv4 hosts using static dhcp addresses.
Tried using interfaces as a target but found out that doesn’t work.

Using standard ISP provided /64 and RB4011iGS+ using SLAAC and ND.
I understand how the router provides the prefix and the client the suffix.
How do you guys prioritise ipv6 traffic to lan hosts when their addresses are changing frequently?

Bump

No one has this issue or has a clue?