Just the fact that this is a 3.4 million word story that was written in 21 months by a single person. HOLY SHIT.
The Relay 217 Incident is a sequence of awesome, involving a ship flying backwards through a mass relay and the Rachni essentially saying "UR DOIN' IT WRONG" to the Batarians and their biotic ship weapons.
This is topped by the offscreen one during the reaper war; The rachni HELD A FREAKING REAPER IN PLACE while the other fleet's trashed it.
Also during the reaper war, Sky taking an assortment of rachni soldiers and workers inside a reaper and effectivelly outsinging the indoctrination to protect them while they destroyed the reaper from the inside out.
The Battle of the Vineyards. Nine Spectres in three Hammerheads, against 90 batarians in four gunships and several attack vehicles. End result. Four wide-eyed and very cooperative batarian prisioners, two hundred liberated asari and human slaves and one very harried Spectre doctor running around attending the civilians.
The last paragraphs of the fic.
Shepard raised her hand. "I have one important question."
Are the Reapers coming?
We don't know. But what I do know, is that if they are coming? There's only one relay left that they can enter this galaxy through. The super-relay EDI and I found, so long ago. . . . . if it's another galaxy completely controlled by the Reapers I think we owe THEM an invasion or two, don't you?