@ Ultratwinkie
Well, well, here we go again.
1. I are not saying they are invincible. Never did, will never do. If you actual read what I wrote. Your the only one saying that. I just point out, how much effort "the good side" need to put into destroying one Reaper, when it was walking over the entire human fleet while doing something else. And then raising the doubt in which it will be possible to stop several 100 Reapers at once.
2. Okay, but that statement are flawed in itself. It is a paradox, which you fail to understand. If something are impossible, but then are done, are it still impossible, even it did just happen?.
And saying that human evolution in the time it has happen are impossible, are somewhat flawed, since it has already been proven wrong since it has happen. Accept it or denied it. It will just show what ever you are a person who can be reason with or live in you own universe of truth.
3. You don't get it, and I cut it out for you. I will just let it lay, if I was you.
4. Did you even read the whole thing I wrote? If not, try doing so, I already covered this and are not going to repeat myself, like you are doing.
5. Again, what are you referring to? You seem to think that they have no plan, when they actual have a pretty damn good one, as I cut out for you once, try and read the whole thing, I wrote, again.
6. ... ohh you skipped that one, continue.
7. The one central thing you fail to understand are that without the Citadel, there are no travel between star system and there are no communication between star systems.
If the Reapers plan went down as it should according to their plan, then Keepers on the Citadel would do what they where supposed to do, activate it as a relay for the Reapers, which would jump straight in and close down all travel and communication down between all the star systems. No system would know what happen before it was on them.
Now I aren't to astrophysics, but the distance to the closes star system from us, are 4,2 light year. Now lets say The Reapers attacked and closed down the mass relays for anything that them self. Then send a radio signal for help, which travels at the speed of light, just under 300.000 Km/sec. Then that call for help, won't be in the closest system for 4,2 years.
The smart thing about attacking the Citadel, as I actual has said several times now, are that they can with one, rather easy, attack, cripple and close down everything their opponent has of travel and communication.
If they close everything down, then can simply pick them off in small chunks, since their fleets are scattered all over their sectors. The only rather complete fleet they need to attack at once, are the Quarians.
8: Can you link that Q&A would like to read it. For me, that just sound like a plot hole, and then there is nothing to do about it.
9: Erm, I try again, She knows most of everything there happen in those areas she has agents in. She do not have agents in Dark Space. And depending on who the Reapers proceed when entering a system, (as mention above) most information will most likely not leave the system since it will be cut off.
I'm surprised to see/hear how stubborn you are about some of those basic things, you just either fail to understand or completely ignore. But at least, you are not 100% lost.