first off, are you running addons? seems like you probably are. each addon going to each account is going to send a ton of inputs directly from YOUR system down the path to the server. I personally have a 10 g card that i use to bridge the network. I have 2 ethernet cords running into my system, one for the normal internet speed, one to by pass the limitations. I can run directly off the 10 g card on some applications for internet. it works for something and not for others. My point is, i have the 10 g card to reduce inputs being sent from my system to the tunnel to the server, thus reducing time the system is hanging directly from what is being inputted by itself.
next, again, i can easily replicate 100 cpu usage damned near anywhere in the world if i don't have my system optimized to run as efficiently as possible. for instance, to get, lets say past 30 you are saying, i'd personally suggest configuring isboxer to handle at least 1 toon per core, thus you should have at least 32 toons set to each thread. reduce the amount of input lag by getting rid of addons, configure most of how you run the system in isboxer so that it further reduces the amount of inputs from your system, to the game to the tunnel, to the server. what i mean is this, you can configure in isboxer to to set a command directly in isboxer to set all your toons to follow directly in boxer itself, or you can set it up in the game. i suggest you set it up in boxer because it will reduce inputs from boxer, to game to tunnel. what i mean is this, lets say in the game you have all your macros set in game, what is happening then is isboxer sends a command to the game client (which is going down the tunnel or path to the server, which in turn needs to communicate back and forth with your system through internet traffic), so instead of having to rely on the tunnel, you set your commands directly in isboxer so that isboxer sends a shot of inputs to the server and thus it will reduce inputs from each having to go back and forth.
all i am saying, if you don't configure your software to run properly on your system, of course you can EASILY replicate 100 cpu usage. upgrade your network card (which will have 2 tunnels going from you system to your router which will thus cut down on usage because less inputs are being hung up in the system). what i have said for the zillionth time now, that MY system, i can easily get past an arbitrary limit because all i am saying, is do your homework, figure out where the bottlenecks are, and figure out how to reduce those bottlenecks. it would be helpful, to turn off as many probrams running in windows as possible, thus less inputs directly into windows when spiking the cpu to handle and overload of inputs.
btw, think i said this nearly a month ago, i recently had neck surgery, it is EXTREMELY hard for me to even type right now, let alone run the game and trying to be comfortable. i won't be able to produce any boxer video's for quite some time, but i will eventually make a video showing exactly what i am talking about, how to configure those settings in isboxer, and how to figure out the bottleneck (what is causing for instance, a cpu to spike, there is several factors).