If the vocals are recorder properly, with good mic, preamp etc. You shouldnt have any problems mixing the vocals.
Put a LA-2, or the bombfactory 1176 comp on the vox. Use heavy compression -30db no problems, if you want a little bit more dynamics perhaps -15-20db.
For example the LA-2a wich is perhaps the most famous (and best??) comp for vocals are famous for how it can compress the signal withouth having it sound overcompressed, not unusual that you compress -30db or so.
After that put a De-esser on the vocals, and then some EQ.
Highpass att 200-250hz noway!!. Dont you want some bottom
end for the vocals?? Atleast for the lead vox. (choirs is a different matter)
Highpass at 100-120hz add some at 3khz and some at 6-10khz, and you will be fine.
Add reverb and delay, if you like. You can also use a fxsend of Waves Doubbler to widden the vocals. IF the band think its cool to have breath in the mix then keep it, if they dont (or you dont want it) then cut it out.
I dont think any PRO's sits and automate the gain controll of the compression. How much
dynamic is it in a modern metal mix
Just read the posts of
Ermz and
Greyskull they are right on.
Cheers