A few tips from my experience:
- tight, solid, consistent low end (running bass through VTM both on the track and VTM on master helps massively with this)
- Mix into a buss compressor (FG-Red here) with max 3 dB gain reduction, I normally ride it at least 1 dB
- I once used the demo version of Voxengo curve EQ to match the EQ spectrum of my master buss vs a commercial mix, and it really helped to show where my mix was lacking - too much low end and not enough around the 200-500 Hz region. A lot of the loudness comes from the mid range, you gotta get that right. I don't think it can be fixed by an EQ on the master buss, I think you need to get that EQ balance right by adjusting individual tracks, specifically how the bass guitar and rhythm guitar fit together below 1 kHz.
Then a limiter should bring it up to -10 dB RMS quite easily without affecting the mix balance. I think trying to get it louder than -10 dB RMS is unnecessary.