Engineer is famously hard to build around, so I decided to give it a try. Here's the logic behind some characters:

* BMR characters: as will be discussed later, the evil team has a few ways to get extra deaths, so I've decided to give the good team some survivability and science options in the form of Sailor, Fool and Pacifist, while keeping Devil's Advocate to explain execution survival.
* Minions: I've tried to make no obvious combination of minions to choose as Engineer. Psychopath and Widow provide some level of confirmation that the Engineer worked, incentivising them to act later than night 1. Making or deleting Devil's Advocate and Assassin gives the Engineer more control over the BMR-ish science narrative. I believe DA is weaker than the other minions, so deleting it to confirm science comes at the cost of turning it into a stronger minion.
* Demons: Different killing patterns, strengths and weaknesses. The Engineer can make an Imp to slow down on deaths, a Po to lock the demon in place while making deaths more predictable, or a Yaggababble as middle ground.
* Engineer/Hatter as a bluff: evil can bluff an Engineer/Hatter activation by holding back on Psychopath kills, claiming a Widow ping, or mixing up their killing patterns with an unexpected sink or Po charge. 
* Outsiders: I'm aware that Barber and Goon can result into 2 extra evils in some cases, but I want both on script for the demon mobility and the droisoning. The Hatter is there as counterplay to the Engineer and for extra bluff space, and should be played with the Lawful Hatter variation. I added Butler for bluffing options against Chambermaid and as an occasional Goon flipper.
* Sentinel is on script to provider outsider modification that doesn't depend on evil setup abilities, which can be bypassed by the Engineer.

What do you think? Is there anything you would change?

Trying my hand at an Engineer script