When you think about it, probabilities plays a huge part in Town of Salem. So, with this in mind, I have thought of a powerful Jailor strategy involving their will. So, the Jailor needs to ditch the traditional will where they go like: "Jailor -- N1: William Phips claims Sheriff -- N2: John Willard claims Doctor". What should they use instead? Well, the Jailor should have a three-part will: Part 1, the Role Tracker (most important). Part 2, the Execution Tracker. Part 3, the Notes.
Part 1, The Role Tracker
This is basically where the Jailor keeps track of all living roles in the game, including evil ones. They will start off writing down the full list of roles and deleting one of the slots when a role corresponding to the slot dies. They also use this part of their will to document all claims. If the Jailor marks a claim as being at night, that person claimed in jail. If the Jailor marks a claim as being during the day, that person claimed publicly. I will give an example.
TI - William Phips claimed Sheriff N1, Abigail Hobbs claimed Investigator D2
TP - John Willard claimed Doctor N2
TK - No TK claims yet
TS - Betty Parris claimed Medium D3 and got confirmed by 2nd Medium
RT1 - Samuel Parris is Med, he confirmed Betty as 2nd Medium
RT2 - Transporter, because I was transed N1
RT3 - ???
GF - ???
RM1 - ???
RM2 - ???
NE - Mary Eastey claimed Mafioso D4, so probably Jester
NK - ???
From this, you can figure out William Phips was jailed Night 1 and John Willard was jailed Night 2 because both of their claims are marked as night claims. Since only one TI is listed, you can see the other TI is dead, meaning either Abigail is Random Town or they are evil. You can also see that the Mafioso is dead because they are also not listed. And also both the Mediums are confirmed and that Mary is suspected of being Jester.
Part 2, The Execution Tracker
This is where the Jailor documents all their executions. I will give an example.
Executions: Executed John Proctor N3 because they claimed Medium with 2 confirmed Mediums already, Executed Mary Eastey N4 because they are obvious Jester
Part 3, The Notes
This is pretty simple, the Jailor puts any other info they want town to know. I will give an example.
Notes: Transported N1, Attacked and healed N3
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So yeah, there you go. While this may be more confusing to the other people, the benefits Jailor gets of determining probabilities of certain roles being in the game and by extension the chances that someone is being truthful about their role, is big enough to justify a Jailor using this will.