Killer prioritization only really works if you a Killer Network interface and since they seem to be disappearing that's unlikely. Personally I think it's a shame because I think a lot of people criticized Killer unfairly. Overall it was a nice little package of hardware and software that simplified matters and helped the average gamer. Anyway, what is it you are trying to sort out? If you want to sort out saturation of the internet ( WAN ) that's a different matter to sorting out the LAN. If your WAN is saturating then personally I think a good bet is either one of the Netgear Gaming routers, which has DumaOS or one of the newer Asus routers like the RT-AX82U. DumaOS is particularly useful for something like an XBox because it offers controls that just aren't available in the XBox itself. DumaOS though tends to be a bit buggy, so minus one point for that! The Asus router is a bargain and it has tons of game related features. One I particularly like is the ability to prioritize all gaming machines on the network in addition to normal QOS. The UI on the Asus though is nothing like as nice as the DumaOS graphical interface, but just as powerful and has more features. I guess the really unusual thing about DumaOS is it's ability to control access to gaming servers according to ping. That's priceless with an XBox. Recently Asus modified their port forwarding to make it really simple. If it is your wired LAN that's saturating then a really good buy is the Netgear Gaming Switch. It's a managed switch, but has features specifically aimed at the home and gaming, allowing you to prioritize traffic according to a number of simple gaming requirements. Nothing an ordinary managed switch can't do, but far easier to understand an implement ( it has gaming presets ).