With this Poll with the Replicators as an opinion that would win by default given their so overpowered and it took a Dex Mecha device/weapon to defeat them; I would say that after the Replicators the Tau'ri would be 2nd with the Ori at close 3rd place biting at the Tau'ri heels for 2nd place; The Wraith would be at distance 4th place; As for the Nakaia I don't have much information on them so would place them at 5th place.