I have arguments in favor of Conflux.
First argument: calculate the cost of building castles, taking into account all the troops. Castle is more expensive.
Second argument: the number of Phoenixes in Conflux, there are four of them per week! And there are only two Angels.
And I remembered a third one. And where are the heroes better? Mages are definitely in Conflux, and warriors are probably there too.
And in the game, everything depends on luck, you can play with any castle.
I'll answer in order.
First argument: in Conflux, to build Phoenixes, you need to build all the troops in order, but in a Castle, you can skip building horses and chickens.
Second argument: 4 Phoenixes can't compete against 2 Archons.
Third argument: I can't say anything because I don't know what criteria you used to evaluate this.