Ran it as the 1-shot version and my players flew through it. With a slightly crazy warlock that was willing to sacrifice part of himself to the sphinx (- Int), tried to join the monks (until the party stopped him) and let Kwalish "borrow" part of his soul to test out the new not-even-close-to-AL-legal armour, there wasn't a whole lot of tension besides the one fight. In that one fight the Master decapitated the bugbear barbarian (aka the party tank) with the very first non-surprise hit on combat, so that had them a little worried. Thankfully they tried to use the Gate spell, and instead of Stygia they got a visit from Hruggek in Pandemonium to bestow a favour on an faithful sower of violence to override his honourable death on the battlefield.
[4 of 5 Stars!]