QOS setup - what ports?

Just got lagged out of a game.  This game seems rather sensitive to lost throughout.  Family member looking at facebook and pretty much debilitated me when they watched a video.  I get that MP games don't need much bandwidth, but need a really good ping, so I'd like to setup my netgear router to prioritize ports for Offworld.  Netgear calls it QOS.

 

Does anyone know what ports I could tell the router to prioritize to try and improve my experience?

 

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