User blog comment:Mexican215/So who was satisfied with the last battle against the Reapers?/@comment-4961148-20130213020747

Personally, I would have been happy with the idea of destroying individual Reapers from within, somewhat like the Derelict Reaper mission from ME2 (i.e. destroying its mass effect core whilst under attack from waves of enemies) but with a time limit. Taking too long would result in indoctrination or other unpleasant consequences that would fail the mission.

The Reapers oddly enough have space within themselves to house a crew. If the Citadel had to be involved, well, the Reaper(s) to be boarded and destroyed from within could be docked or otherwise attached to the station, physically preventing the Crucible from docking.