Hey!
Lurker and IT believer here. I have two questions I haven't really seen before. One will lead into an idea, the other is pretty straightforward. A bit of warning first: my way to IT was and always will be taking everything literally and then picking on its absurdity. So, this post will assume, for instance, that space magic is true and it works and it fits the theme.
First the simple one: Anderson mentions that the Reapers are preparing for something big in London very early. I can't remember exactly when, but it is long before we learn about the Catalyst. Were they planning something other than the end? If so, what was it and why was it dropped? If they were planning on moving the Citadel there, then TIM's shocking and dramatic betrayal (telling the Reapers about the Catalyst) did absolutely nothing. What's with that?
Second question. We are told that the Protheans were building the Crucible, that they very nearly finished it, and that they thought it will save them. We also know that they knew Catalyst = Citadel. They didn't have the Citadel for centuries. What were they thinking? Hate Javik all you want, the Prothean weren't all morons. They couldn't possible expect to retake the Citadel. What's with that?
Now for what is conjecture on my part. The above leads me to believe that the Crucible is in fact more than a power source. I say it creates the RGB beams. However, those beams on their own only travel at light speed. Even if they have enough energy to cover the entire galaxy, it would take a little while. So, the Citadel, the centre of the Mass Relay system is needed to disperse it. And perhaps you can only fire it once, making moving it around to kill Reapers system by system impossible, and it's scale making building dozens of it quite unlikely. A definition of catalyst from Merriam-Webster: an agent that provokes or SPEEDS significant change or action. (emphasis mine) This at least makes some sense.
Let us take this further. As I recall, a closed-up Citadel is pretty much invulnerable. The plan to send Hammer into the beam is, in reality, worse than suicide. The Reapers are vastly more powerful in a space battle than us. Without a doubt they could afford to send, say, 10% of their forces to land and defend the beam. How much chance do you suppose the ground forces have against ten capital ships and fifty destroyers? (This is a very, very, ..., very conservative estimate of their numbers, to make my point even more obvious.)
And that is ignoring the blindingly obvious: shut down the bloody beam.
I understand that getting the Citadel to work with the Crucible and thereby achieve complete victory is tempting, but non-indoctrinated Hackett & Anderson are, much like the Protheans, not morons. A significant portion of the Reapers forces are concentrated in Sol. Fire the Crucible there, then we can take control of the Citadel with ease. The Reaper's MO is to use it to shut down the Relays and take the galaxy system by system. Time to do that ourselves. The entire military might of the galaxy is concentrated in Sol. It is not unreasonable to assume that the Reapers not present are fairly spread out. Keep the fleet together and hunt them down. The Reapers aren't invincible. They are scary because while they are way more advanced than us they also can match us ship for ship, and more. (This is not a fact, but based on established lore it is very likely true.) After dealing a major blow to them, hunting them down one by one might just be possible. Now, I am not convinced this would work. In fact, I'm inclined to say we would still fail. But it's a much, much better plan than Hammer.
To close this out, I just want to stress that I am not trying to come up with a new ending, or argue for a "conventional" victory. In my mind, this scenario comes naturally from my issues with Vendetta. My point is, why aren't these issues addressed, at least on the level of lip service? My intention is to support IT by showing how nonsensical the alternative is.
Regards, Arkennys