Do you guys find it more effective to have less mids on the amp or to eq it out in mixing?
I tend to overcompensate with mids (about 7 - 7.5 on 5150) and then take a good deal of 500-800 out with a super wide Q, then a gentle boost around 1.2khz ish to compensate for some of the "power" lost. I find that if you put too much into the amp then its very easy to take away from that cloudy mid-mid area. If you are scooping the amp and you find the guitars have no power in the mix, then can be more ugly to add it in, I cannot think of any scenario where boosting anything from 400-800 sounds good aside from thin overheads.
Unless you have an amp that sounds great scooped (plexi style marshalls or Soldano) but then thats more of a lead thing, where you can dime the presence to give it power over rhythm guitars.