Someone With Mass wrote...
Lotion Soronnar wrote...
Thirded. Teh Crucible/Catalyst is utterly dissapointing. And stupid. Even mroeso because of Protheans.
I'd like to see you come up with something better that isn't just a massive space battle.
Way ahead of ya.

1) The AI weapons hinted at in ME1 and ME2--
These weapons are tied directly to the fate of the geth, and later to husks. What we know about the geth-reaper relationship is that the geth worship the reapers, not out of direct control, but out of a religious impulse. We also know that the geth, quarians, and cerberus have developed separeate means to hack geth extensively. A subplot following this train of thought could lead Shep&Co. to helping the development of an AI weapon that would allow them to hack entire geth fleets, thus allowing them to attack the reapers when they absolutely least expect it.
2) The Main Factions--
-The Alliance
-The Council Races
-The Terminus Races
-The Mercenary bands
Unifying these three groups could prove instrumental towards pumbling the reapers, not into submission, but back enough to allow for further development of more experimental tools. The main advantages of force would be the Alliance, Council, and a few Terminus System fleets (Illium, the Flotilla, Tuchunka, Bekenstein, etc). The Gangs (including Omega, Eclipse, Blue Suns, and Blood Pack could produce the extra punch, supplies, and personnel to ensure that the new alliances stay fairly strong).
3) The Collector Base + Citadel + Relay controls. I don't need to elaborate much on these things. They are Reaper constructs now in human hands. The potential for their combination and application could easily be constructed and believable, especially considering their powerful creators. My idea would be that they could be used to thwart reaper transportation throughout the galaxy, limilt reaper communication, identify solutions to indoctrination, and locate reaper artifacts.
4) The Hidden Weapons.
-Giant objects hidden in gas giants
-The batarians and their fleets
-The Leviathan of Dis
-The possible Reaper homeworld
-batarian and geth weather controlling machines
-possible uplifting of Yahg
-reintroduction of the rachni civilization
-other sapient aliens
-The prothean artifacts
These are things that not even the old machines can anticipate Shepard manipulating to his needs. They may not be that powerful on their own, but when combined witih the overarching war effort, they'd be incredibly valuable. The prothean tech would be most important, as a historical analysis of WHY they failed to beat the reapers could alert Shepard to reaper tactics.
5) The information networks that need to be allied and reformed
-Cerberus (big one for ME3)
-The Shadow Broker
-possibly STG
These, like the prothean tech, could alert you to reaper plans, fixing problems like indoctrination, providing some troops, and help solve the issues of feeding the war effort.
And finally,
6) The last minute Deus Ex Machina -- the killing blow to the reapers, only used really when it comes down to deciding the fate of the reapers, and the galaxy at large.
Now, just to reiterate, you have:
-Your spy weapons (the geth)
-Your main distraction/aegis (the fighting and political forces)
-Your enemy's tools (the base, citadel + relay control)
-Your overkill plans (the hidden weapons)
-Your information/research groups (Cerberus, SB, STG)
-Your backup plan (the deus ex machina)
Basically you've got every avenue that the Reapers had covered under your own control. Your enemy must now rely upon brute strength to beat you. Lets say that you only need three of those six things to get a passing grade, and the more things on that list you go for, the better endings you get (at the price of risking losing more squad mates, facing more conflicts, etc). In this way, In this way, The game wouldn't be so much of a linear path as it would be a giant puzzle of how you want to kill the reapers.
It seems complex, and maybe it is, but I think that its not that unreasonable considering that ALL of what's on the list SEEMED to be hinted at in the previous games. Every last thing.