Yeah that should do it i think. it's kind of hard to configure the settings if your not playing on absolute minimum tho, as I've played 2v2's with anistropic w/e it is x4, #2 shaders and bloom, unit detail/grass/buldings on highest, antaliasing x2 and genrally fairly good settings like those (minus shadows which I'll always keep to none) with minimal lag, however if i were to try it in a 3v3 my fps drops to 4 lol

But on absolute minimum settings which i'm currently playing mp on (bilinear etc)
i don't get any lag in 3v3's and 4v4's unless it's someone elses fault. U can tell if it's you or someone else as the camera movement is laggy as well. There's another possibility that it's your internet connection, but even 1mb should be enough I would imagine.