So your hypothesis is business users are compromising your gaming? Might it also be said that your gaming is compromising business : -)
I'm just kinda curious if you resolved your problem? There's a lot of talent on this forum (not me) if you'd just give them a little more info to go on. Like what is your subscribed Internet service rate up and down? What do your Internet speed tests show when things are good? And when they're not so good?
You mention
Ping. What are you seeing for ping times (good and bad)?
You've some neat tools available on your Asus (and even more so with RMerlin). What are you seeing under Traffic Monitor? What do you see when it's just you and your gaming? What do you see when those pesky business users are on?
What devices are connected when your gaming is going well? What devices are connected when gaming is not going so well?
Collect a little data and the problem might make itself known to you. Share the data and someone here is likely to point you in the right direction.
For example here at work we were having numerous problems, outages and we had no clue. Replaced our old router with an Asus N66U. Still had problems but with the Asus Traffic Monitor we could see we had at least two different types of problems.
- Lots of traffic coupled with horrible Internet performance.
- Very little traffic with even worse Internet performance.
For problem #2 we tried something called
PingPlotter. It's a tool that graphs an automated series of pings and tracerts. From it we learned that our ISP likely had a problem with their router (which they fixed). We also learned we had a couple problems with our local network (which we fixed).
For problem #1 we learned we had some client issues (online gaming, streaming video, and the
new iPhone thing). We solved those with QoS. We can still observe those things but with QoS implemented our users don't ... perception is everything.
Good luck and do keep us posted.