One the first of the 2 questions:
1) Do whatever sounds good and makes the client happy.
Be it a lot or no reverb there are no set rules.
I hate when people say there is no reverb in certain mixes just because they can't tell.
Truth be told its there but its blended into the track really well.
Part of the secret is the artful use of compression and panning on the tracks.
That's why mixing is both a technical and artistic endeavor.
Heck when mixing at rap at times i'll add a little reverb and delay on kicks,snares and hihats and to alot of guys(the assistants) this is a shock.
Again do whatever works.
2)How do you tame the sub-bass?
This is easy.
Mix it straight and tight up the middle and when you get to the extreme bottomn you'll have space.
I tend to add a little suboctave shifter on the main hard hiiting kicks(around 44hz). to give space to the bass.
This usualy frees up the 100-120hz region where most basses live.
From 75hz on down you got lots to work with.
Without a monitor where you can hear the bottomn its pretty tough though.
