Yeah currently leaning Sovereign unless there is some kill switch Luke can make his way toward (I know Luke could deal / slaughter the Husks + Indoctrinated etc but Sovereign is still a problem)
Granted Sovereign being arrogant would probably just chill until **** starts to go down (ME3 might reveal a kill switch but atm dunno)
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XBL GT: Demon Ninja X2
"There comes a time in every man's or woman's life where they have to make **** up to cover their ass." - Hazama