Workshop

Uran, how about this: the Fortune Teller's mana doesn't depend on the presence of specific roles in the game. When the Scholar, Soothsayer, and Warlord are eliminated, they each gain one protection against being killed, but when they are all dead, the Fortune Teller becomes vulnerable to being killed. Full immunity is retained (except for being killed, when the specified condition is met), including immunity from being hanged until the third day. The win condition is as follows: the Scholar, Soothsayer, Warlord, Inquisitor, and Mafia members without immunity to infection must be eliminated.

Until the third day (nights 1, 2, and 3, and days 1, 2, and 3), they cannot be killed or hanged. From the 4th night onwards, they have one protection against being killed. If one of them (Scholar, Soothsayer, Warlord) personally kills someone, they receive a one-time protection against being killed in addition to their immunities. (the second protection will not accumulate until the first is used; the protection saves from one killing, but will not help in the case of a double shot)
And yes, they get one protection against being hanged for each of the three who are eliminated from the game, regardless of the reason for their elimination.
The win condition is that all those who can be killed by infection are eliminated from the game (i.e., Earthborn and Immortal can remain alive). This might work, although the Fortune Teller still remains the strongest role in the game and won't be eliminated before the fourth night (and even that is unlikely - they have to receive a shot from both the Mafia and the Ranger).