For high speed blues, my favorite are from the crystal ridge express chair. Rock'n'roll and ridge runner being my fav.
After you do those it's super easy to access glacier express chair, if you want to try something more challenging or jersey cream express chair if you want to go to the whistler side.
Since you have 4 days, I wouldn't worry about the "not to miss" runs. Just explore and have fun. You'll discover your own favs.
AlpineReplay User Name: Rain Kim