Many of the narrow spires in the area are not resolved on maps despite their significant prominence. Not sure if you want to add summits based on my limited info, but here is what I learned about 3 that get cimbed regularly (via gps coords, length of pitches/raps):
Spire One: 43.8486, -103.5347, 170 ft prominence w/ respect to Spire Two, easiest route 5.7+
Spire Two: 43.8485, -103.5346, 180 ft prominence w/ respect to Spire Three, easiest route 5.6
Spire Four: 43.84889, -103.5335, unknown prominence, easiest route 5.4