Cool! Looks like a challenging event to cover. I encourage you to have fun with it and try using a 0.5-2 second exposure with second-curtain sync flash. The result is a really interesting look to the images, but in my opinion, it looks "real" enough for your purpose. It all depends on what your company is looking for. Maybe they want a more natural and neutral look - Then you might want to look into renting a 24 1.4 and/or 85 1.2 if light is especially bad. The 50 1.8 is a great lens and I think it would do the trick for your natural light shots if light is decent.