Mechanically, I believe the BEST move would be a roleblock on whichever killer comes first in priority - it would give the other killers incentive to try and bus them so they can attack, and it should give some very telling interactions.
The WORST move is a Heart Rate check - Learning about an inactive killer is “cool”, but all it’s going to do is give the primary killer more time to strike. Also any High checks are a waste of a night which is Very -EV
Look I think any half decent player can make some decisions regarding their role that don’t require crowdsourcing, and still leave the game in a decent place.
This shows that they’re thinking quite carefully about who the Specialist is. Which means they’re probably a Killer. I might even say the same thing for you, Golden Girl.
Now if I was a Killer, I would be looking carefully for clues about who else is out there. Because well, you can get trumped by another Killer in the end. Just sayin’.
See who’s trying to not get 1ynched?
See who’s trying to break into a towncore?
See who’s trying to cause distrust between others?
There’s many ways to read for a killer here. Just because someone is hunting for spec doesn’t mean they’re a killer - it means they’re just simply trying to find out Who Specialist Is - whether it be for better reads or a nightkill option.
How should we play today? Try to eliminate things that are alignment indicative.