Do a zero level restart.
Zero all levels, and work the main elements to their repective volumes. Then start fitting the other elements around them.
Try using more subtractive eq than additive, as you will get a cleaner and less cluttered mix.
And generally add more top to the high elements in there.
Also maybe the bass is making the mix muddy. Pull out any frequencies on the bass that aren`t necessary.

As for what format I prefer.
Wav, or mp3.
Loops or whole tracks streamed dow.