The Tower XV1 and the Devil XV - connection?

[Yygdrasilian]

Consider how these might fit together:

5: STAFF
._______.
[....XIV....]
[......5.....]
[...disks...]
[......5.....]
[..wands..]
[......5.....]
[...cups...]
[......5.....]
[.swords..]
[......V.....]


6: PILLARS
._______’ ‘ ‘ ‘ ‘ _______.
[....6....].........[....6....]
[..cups.].........[.disks.]
[..........].........[..........]
[.....6...].........[....6....]
[wands].........[swords]
[..........].........[..........]
[....VI...].........[...XV...]


7: SPIRAL
.............................................
................7 cups....>>............
.........^^........................7......
.........7...........XVI........disks....
....swords..............7.....vv........
........^^............wands............
.........VII................................
.............................................