Considering that the killer can’t kill every night anyway, I’m not sure…
I imagine what will happen if the events unfold similarly to the previous game. The Priest is killed on the first night, on the second night, the Mafia exposes the Mana, and on the third night, they redirect him to the Villagers (and he doesn’t even know about it!)...
And considering that there are likely to be no clues, it will be difficult for the Mafia to guess who to redirect. This is a strategic approach, not a giant, raging troll)
I think the Seer should at least have protection from being blocked, so that they are not deprived of the ability to kill with just one block.