As it was my first game, i got ideas from Peeps, mr-paul and Yvonne as to what to do. It was suggested to try and balance it out a little, so i tried that. I gave the mafia and town an untarget-able player and the same for the double votes. Each had a roleblocker and a tracker as well.
I tried to balance it, looks like i gave too much of an advantage to the mafia. Who knows, maybe 3 mafia was too much in a 10 person game. May have lasted longer with only 2 mafia.