I've just found out that Gargantua from Half-Life and the Arch-vile both have flame attacks, but it is the Shockwave Stomp attack that resembles Arch-vile's the most, as you are chased by a tiny red flame and you have to step aside to avoid the attack. another one of Gargantua's attack that resembles Mancubi attacks is the Fire Jet arms, but Gargantua's is more of a flamethrower and Mancubi are more like great balls o' fire, like Jerry Lee Lewis would sing :D