What are the chances of that happening, however? Even if that were the case, Apollo, he could have obliterated Jedi en masse in guerilla-like warfare for years, thinning their ranks, killing off his enemies and waiting to wipe them all out. After all, as you say, Bane is 'quite the genius', even if Sidious is smarter.
For all we know, that's what he could have been doing. Too many unknown variables to accurately speculate.
To be fair, this belief you cite only happened because a.) the Sith were treacherous and b.) he didn't believe he had the power to do it himself.
If I remember correctly, didn't he claim that nobody would have the power to do such a thing?
Declaring him the ability of 'unlimited Force energies' means, quite clearly, that he does have the power to take them all on (or at least very large groups of them). He had the intelligence, the resources, and - according to you - the power to take them all down, yet he didn't.
Well I don't know about that. It's not like it makes him 100% unstoppable. As I said in the other thread, Bane can't simply access the entire unlimited supply at once, and it's not like his passive powers would ever be increased (as he would only be able to actively use them, it's not like he can actually increase his force connection with them), for example his force senses, precognition etc... For all he knew, he would have been perfectly vulnerable to being snuck up on and attacked, and destroyed through those means. It's likely in fact that Bane simply didn't even attempt such a thing, knowing that it could jeopardise the secrecy of his sith order. Really, as I said before, there are too many unknown variables to accurately speculate.
Again, if he has unlimited Force energies, he can take them all. Perhaps not Nihilus or Sidious due to their drains, but, it is possible. Unless of course this is simply not the case, or there's a big fricken catch to it all.
Not agreeing with how the drain technique would put Sidious and Nihilus above Bane, but whatever (I'm not one of those people that views the attacks as one to which there is no defence). As I explained above, the orbalisks don't make him 100% invincible, Bane would know that, so his original belief of how the Jedi could never be defeated through brute force would have still stood, so it's likely he knew never to attack the Jedi with pure brute force. The fact is, just because Bane never attempted to defeat/defeated the entire Jedi Order through brute force, that doesn't mean the orbalisks don't really make him as powerful as it seems, because as far as I'm concerned, nothing contradicts how powerful the orbalisks make him, so my argument still stands.