if a robe had four slots you could have four rift crystals and be immune to all damage.
which may be the reason why it only has three slots.
If memory serves two rift crystals is enough to teleport to any location visible on the screen.
The races and target practices are loving bullstuff. The best medal is impossible to get. The first race is a piece of cake but everything else is plain impossible even at A grade materials. My best time on the castle race is about 8 seconds. I'm teleporting all the way through. How on earth are you supposed to get 6 seconds?