After all the testing I have done.
I have concluded Duma OS classified is the BEST option.
Duma OS classified uses DPI to detect UDP traffic. I believe this is the lowest latency detection wise for that gaming traffic. Delete any other rules you may have, and use the Duma OS classified. TRUST ME.
The reason I say this is because the port based services and even manually entry add more latency IMO.
I have the xr1000 and I promise you, this is the best option. I will test the R2 later this weekend and report back.