Scorpion, because he is the only one in the group that is actually a ninja.
But pretending they are all ninjas then I would go Sub-Zero. Then Ermac, Smoke, Scorpion, Rain, Reptile, Chameleon, Noob, Hydro, Tremor, Cyrax, Cyber Sub-Zero and Sektor in that order.
Female wise-Kitana. Then Jade, Frost, Mileena, Khameleon, Tanya, and Skarlet in that order. (Don't think I left any out.)