I'm keeping the shotgun for now because I need the runaway attacks still. Flare gun is fun to use against sentries tho. It barely does any damage but oh well.
I farmed them all. I have all the achievements. I used bots in create server and went t teh pyro event. I use flamethrower, flare gun, and axesfinisher. The falre gun is soooo fun. Also my most kills in a single round with pyro is 2865 or something.
i have them but i hate getting killed by a pyro i feel its a skilless class but thats my opinion, i do understand pyro is a realistic class because fire is that hott but im a spy fanatic and its not fair =P =(