Which is stronger, a Castle or a Conflux?

of course. You need to be able to play with all the factions, but I see the strength in this faction and it's very significant. I don't understand the argument that Inferno is the weakest faction. The only faction in which I don't see any sense or strength is the Swamp... but that's just my opinion, although there are valid counterarguments, because I know a person in London who plays with the Swamp as if he was born there and knows everything about it.