The extended duration and potentiation depends on the gut MAO-A inhibition, and the dosage of the Harmalas. If you predose the Harmalas and consume the mushrooms when gut MAO-A is fully inhibited, the Psilocin will be potentiated and the duration can be lengthened to 9 to 12 hours, depending on the Harmala dosage and maximum potentiation of the Psilocin through gut MAO-A inhibition. The duration can be normal or shorter if you miss the gut MAO-A inhibition window and don't get the potentiation. As for how the experience unfolds, i find it unfolds in a similar way to LSD, with the first few hours being the trippiest, and then around hour 4 or so giving way to a prolonged stabilized period and then a few hours later the come down and afterglow. Idk about cyanescens though, i've only used cubes and 4-ACO-DMT. But if you don't want the extended duration/potentiation, either take a lower dosage of Harmalas, or perhaps just take the mushrooms perhaps at the same time as the Harmalas, or perhaps take the Harmalas first and then a couple hours later take the mushrooms, but if you take the mushrooms when gut MAO-A is inhibited the Psilocin will be potentiated, just depends on how much Harmalas you consume and how much MAO-A inhibition you have going on and if you consume the mushrooms when gut MAO-A is inhibited.