What gimmick loadouts do you like to use? I personally really like trolldier for those satisfying shovel crits, but I also enjoy fat scout and combat medic.
I take a bow, but more importantly I take the Cleaners Carbine and Bushwacka. The idea is to play near the front and build up Crikey, then activate it to get guaranteed crits on the Bushwacka. The bow is basically for cheesing sentries.