Firstly, it is SOHO device, so it's better to write in SOHO community. However, yeah, some Archers can work now only with MAC-addresses for QoS. The main point is the same though, for example, you configure 10 MACs for High priority and you set it 50%. It means, that if nobody of these 10 MACs is online, 100% of bandwidth will be splitted among other 60 others, while when 1st MAC from high priority appears, it will have 50% guarantee bandwidth. If 10 high priority MACs are online, it will split the same 50%.