User blog comment:RayShepp654/How to defeat the Reapers Theories/@comment-1221773-20101031021231/@comment-1221773-20101031062243

It doesn't matter if they've scorched the Citadel before, it's a viable way they can get rid of your vaunted defense forces. The Citadel's superstructure is all that really matters, and we know from the Codex entry it can take a considerable beating.

But we're going off on a tangent, getting bogged down in details. There is so very little that we actually know about the Reapers, and we're basing this whole discussion on that. For all we know, the Reapers have another control center for the relay network elsewhere. Or there could be tens of thousands of Reapers, in which case they can swarm across the galaxy unimpeded. Or the Reapers could have another plan which has nothing to do with shutting down the relay network. This discussion is pure guesswork, especially the assumption that the Reapers will invade at all.