11. Optional elements
If the monster has nuanced motivations or behaviors, consider writing out tactics for the monster, as a series of "if-then" conditions and behaviors. This can help you portray your characters with integrity, and speed up play.
To write tactics, think about how and where the PCs are most likely to encounter the monster. Write an "if " or "when" statement for that, and what the monster will likely do as a response. What are the PCs likely to do next, and how would that affect the monster's behavior? Write another if/then for that. Keep following the likely forks in the paths, writing ifs/thens until you've covered the likely results: the monster attacking, the monster fleeing, the monster agreeing to let them go, etc.
If you expect the players to Know Things about the monster, then maybe prepare "something interesting" (for a 7-9 result) and "something useful" (for a 10+) in advance. See Know Things for guidance. Remember, though: these notes are for your benefit. Don't bother prepping stuff you can improvise at the table, or things that are obviously implied by the monster's stats. Prep lore to fill in gaps that aren't otherwise apparent, or to pre-plan just how much information you'll give on a 7-9 or a 10+.
Finally, consider writing one or more custom player-facing moves. If there's something the monster might do to the PCs, or an effect it might have on them, and a custom player-facing move would help you resolve it in play, then write it up. Player-facing moves are particularly good for resolving nasty attacks or touchy, unpleasant effects. Mind control, instant "kill" powers (like petrification), and poison are all good candidates. See Writing moves for guidance.
I imagine the players might Know Things about the Almtakers, and what they'd consider to be a "worthy" offering. I think of something interesting and something useful, and add that to the write-up.
I'm also thinking that their telepathy makes them particularly difficult to deceive. I write a player-facing move to reflect this.
When I'm done, the Almtakers' write-up looks like this: