what i did: (i lvled up all my weapons twice this way, too) i went to el sudoron through the back beach on padres, and threw a knife at the vet or grunt, then switch to doll, curse and schorch him, poke twice, switch to sword, do a few combos, switch to knife to finish him off. make sure you get a good amount of low power hits with each, because then you get more rep for yourself and the weapons