I strongly recommend it. It’s first come first served in the regular line, and you would need to queue about 90 minutes ahead of first entry for a shot at the first wave of the show. Even then, you’d likely get a 2 or 3 card and miss the first piece of the performance. The first loop of the show is often the most intimate due to the lack of folks in the space, and you want to make the most of that time. With an Oz ticket, you can not only show up about 30 minutes ahead of first entry and reliably get an ace, but you also get the reserved table, which will make your life far more comfortable for the musical performances after the show itself.