This adventure will definitely go long. There can be several instances of NPCs fighting each other. It is not worth making all the rolls for their combat. As part of your prep, you should come up with great discriptions of the NPC fights and decide based on plot which side is winning each round to focus on the player actions. The riot in Phlan had some good exposition about conditions there. The role play at the private prison was great and for my players ended up like the end of a Bond film with the prison burning, the prisoners scattering to the wind, and my players feeling like they did the right thing. My players spent quite a while scouting the King's Pyre. They had a great time trying to get the groups to fight each other and scaring Little Eric with an Owl. A party that always starts fighting first could be overwhelmed.