Multi band mid/side comp, and a mid/side limiter. If i want some color ill add different comps with 1-2 db reductions, or do some mid side distortion. Nothing crazy though, its just to get all the sound a sheen.  I try to get the color i want without stuff on the master besides a limiter to make sure I don't accidentally play a sound too loud and break my speakers or monitors. Ill have my master chain grouped and only turn it on when i want to hear what it sounds like.