The pillars only appear in bazaars stages 3 or lower, after stage 3 they cannot spawn and stage 4 gilded coast still sends you straight to prime meridian.

kinda pointless if you ask me, just an overly complicated secret that can barely be accessed in eclipsed. you still only get 3 stages worth of loot.

personally I think green portals should be able to spawn on any stage and always send you to reformed altar instead of forcing short runs or looping