something which is flame resistant.
think about it. Simple, useful, and would work very awsomely. maybe a flame resistant something instead of the revolver, to not make this too overpowered.
Instead of the knife, im thinking something that the moment you get one backstab (a proper one, no sidestabs), your next few shots will all eb quickslashes, and they count as backsabs unless the target is completely facing you. However, after these slashes, you cannot claok or disguise for some time. Myabe instead, make a knife that makes it so that it's a backstab if the backstab animation comes up, no matter if he's facing you or not when the hit lands.
Instead of the sapper, a self-destruct bomb. The bomb works by killing you instantly, and has the same effect as two demoman stickies. Hurts both enemies and teammates. has a 3 second countdown in which the number appears above your head and changes each second. If you get killed before the time is up, you die and noting else happens. The counter is so that spies cant just go into a large group and kill everyone.
~Safibn