When you say 'compressed as a snare should be'... can you elaborate? Posting audio clips is best.
There is no single correct way a snare should be compressed, but it could just be that you're squashing it a bit too much or in the wrong way. 2ms sounds awfully short - you'll be squishing all the attack of the snare with that. Relax the attack time a bit (10ms at least) to allow the transients through intact, if not 'enhance' them by bringing down the level of the main body of the sound relative to them. The uncompressed attack of the hits will punch through the mix and help the snare hold its ground amongst heavy guitars without having to be too out front.
As kcearl said, the bottom mic (if you tracked with one) can add some nice high-end crack, but don't overdo it. The snare can end up sounding very rattly, harsh and brittle if you push it up too much.
Another thing to consider is if the guitars are eating up too much of the space in the mix. Maybe some subtractive EQ'ing to scoop out some room for everything else? Are the guitars hard-panned? This helps create space in the middle for drums and vox.