I wanted to sleep on it to help me decide
As promised, here is my spiel.
So when I look at a board, one of the things I do is look for combos. Yeah there's the big stuff like NV/Bridge, Hermit/Market Square, those you just build your whole deck around. But then there are other ones like Apprentice/Fortress, FV/Wharf, Apothecary/NV, Tactician/Black Market, and lot of the stuff mentioned here -- synergies strong enough that even though they don't dictate all of your strategy, they are incorporated strongly into it.
The way to get better at knowing these explosive synergies is to just know about them. I thought a thread that lists a bunch of these good ones would be useful.
So that's what I wanted from this thread. Anything else I've said was just a (probably misguided) attempt to keep the discussion from going off to some other direction.
So like, what is the right thing to do here? I kind of hoped that the community could just have an on-topic discussion without the need for me to moderate it and someone could just scroll down the pages and read lots of really cool tidbits of knowledge. Instead, they have to weed through a bunch of sarcastic suggestions, or maybe some suggestions that turned out to not be so good after some discussion. Whether or not I like that is irrelevant, that's what's going to happen.
So in order to have the resource I wanted, what I'm supposed to do is not only try to keep discussion on track, but find the combos that were deemed "good enough" and compile them on a list in the OP. As you can see, I'm bad at that. Because I'm bad at it, I'm less motivated to do it because it frustrates me -- all for personal reasons that are totally irrelevant. If I'm going to contribute to the community, I should just do what I'm good at, which is probably making videos. And not doing this.
Maybe there are some other people who are more motivated to do that. Sure, they should go ahead and do it, I certainly won't be offended. I'll even contribute when I think it's meaningful.