Whatever works best! Our team uses a few arms, and an internal gripper, and though it's not as fast as some of the elevators and roller grippers I've seen on CD, but it's good enough to make it through regionals, which is something amazing for Team 256. We haven't been the best team for the past few years, but ever since I became a Freshman (this year), I've made sure the team does better! Back to the lift design, every robot I've seen uses an elevator/forklift like design, so I think our unique design will differ than everyone else's. In a competition where everybody has similar robots, a unique robot that works in a different way than the others, and cannot be blocked in the same way others can has an advantage. I personally think the BEST lift design is the most unique design.