Warping only costs 5 more Diamonds than Hovering, and it has the chance of bringing you back to the room with a Friend in it, skipping everything after the Vader look-alike. It is random, but a lucky run that gets good warps on all of them (in or near the Friend room, skipping the Hover) saves time. Possible on Kessel and Tina (the ice planet) so there isn't much of a need to reset too much. Saves a minute or two and makes sub 15 (or even 14) possible.