Route all the way down from the gondola is good (be prepared for walk or taxi at the bottom if you are a boarder)
Or down underneath the new 4 man is nice and then traverse accross to any of the bottom ones (the black here at the bottom isn't really a difficult challange)
Most of the mountain is red so if you are an intermediate you should have fun on most runs.
I agree with previous comments. Do the chairlifts x 2 in front of the Rila in the morning and get the Gondala in the afternoon when the ques have gone.Good reds whereever you go. Best run is probably from the top of Gondala to Yastabets hotel and back up the new 4 man chair, again no ques. Steve