hmm, hard to say, i would try to increase RMS on separate sounds,. when not overdoing it, iit can help the track to sound heavier once all the sounds are mixed together. i also hate too much of limiting as it take out the naturality and dynamcis of the sounds, but it could help a bit when you need morenergy in the sounds.

maybe you need some accoustic treatments in your studio as you can have inbalance low to hi frequencies...