Just some tips for leveling alone the demolitions perk. I suggest to do with a 5-6 support lvl just for the increased weight and the free weapon. Clots, and bloats. Why add clots? Because usually takes several grenade shots to go down, so you will ran out of ammo. 1 wave, use the shotgun. Just refill ammo shotgun, not armor or nades. 2nd wave too, ifm you cannot afford the M79. DON'T sell the pump shotgun, if you got the hunting, sell it and buy the pump shotgun (this ammo is way cheaper, but effective to that kind of specimens)Wave 3, change to demoman temporally to be able to afford M79. Use hit-and-run tactic, ut from far. Shoot with M79, change to knifeand run to a safe distance. Shoot to groups of clots/bloats with M79. If you shot 2 times a bloat and dont die with the nades, dont waste a 3rd nade, use the shotgun. Also switch to shotgun if they are close enought to be blowed with your own nade. Use now some standart grenades if you run out of ammo, this count for perk damage too. Wave 4 if you can afford the revolver nade launcher, throw your shotgun out of the trader with the key under the Esc, up to the Tab key and left to number 1, buy it, and change to Support again. Take the shotgun and refill your weapons first and later standart nades. Use the M79, combined with the M32 from far away. Just same as wave 3. Keep going until, at least round 6. Reset and keep going. I do that on Farm normal and hard, easily to do on hard, just to have money and high chance to survive, but in no demo level up, normal could be handful to level up to 1 or even to 2. I just tried to level using that to lvl 3, cos I like to level playin as usual, but to make at last decent to use it I level up it. Some tips: stick to the roads around you spam, beause you could see them and throw the nades better. If they get close use your pump shotgun, and run away. If you have some extra bucks buy the armor, it could save you. This are some basic guidelines, I didn,t try different tactics, I just think a lityle and play as usual, so A)No warranties to be good B)If any tries stickng to it and verify that, please, let us know it. Greetings from Spain ^^