If you need a player to live, then you either make them unkillable, or you make it where that player doesn't have to live[for the game to work].
Anyways, you really have no right to tell me to "stop sucking", I'm not sure if you go to mafiascum, and if you do, you play in any of the games I've played in, but this is my usual play day one. I can provide examples, if you wish.
Additionally, the role of the mod is to stand back and make sure no one breaks the rules, and to garner replacements and administer role counts and, y'know, moderate the game. They are not to interfere with the game unless someone breaks the roles or needs replacement or the game needs a vote count/deadline. What you are doing here is interfering with the game--in this case, asking a player to not die.
Thank you.