User blog comment:4Ferelden/Mook showdown - ME adversaries vs. other games!/@comment-3228423-20130506123953/@comment-3228423-20130506224641

Yeah, probably for the best. Besides, Reapers kinda seem to have the disadvantage due to probably being unable to deal with opponents much larger (Brother Moons) or just plain superior (Flood, which are Precursors, and seem to be capable of infecting AI)