You're getting imprints every 4-5 minutes?? I just posted a detailed update on one of the hotfix pages about my current imprint luck, which is four imprints in 34 lives, which probably took at least 4-5 hours to run because I was switching wilderness regions for beast form adaptations. Also I don't have 5000x speed available yet, so it was mostly at 500x or 1000x. There's just no way the imprints are accessible with the current system, but the Imperial City implies that we should be able to complete imprint series.