Also being a lefty I experience the same pain in the same areas. Last season I lost almost five weeks due to the pain. I finally saw someone trained in airrosti and seem to have found a solution. Focusing on the glutes, hamstrings, and psoas muscle (look it up) really helps me. Roll the crap out of the side of your leg with a Trigger Point roller from your middle back all the way down to your knee. Use a lacrosse ball and dig into the painful area (this really hurts, however, you'll eventually feel a release). Do glute bridges/hamstring bridges. I warm-up before and after I ski. This isn't a do it one time cure. You need to stretch these areas every single day. Hope this helps.