I am also surprised by such news. I always considered the Conflux an interesting, but somewhat weak castle. It cannot compete with humans or warlocks.

I think you are confusing online and offline...

In online, the Conflux is a fast-developing castle, which creates an imbalance AT THE START of the game. The growth of +4 phoenixes is very important in the beginning... Later, as the game progresses, this is neutralized. Otherwise — fast, untouchable butterflies, the strongest second-tier ranged units in their class, fire immunity, the fastest accelerating heroes (Moner and Pasis)... Plus four phoenixes (or rather five, since 20% are reborn) — all of this provides a very significant advantage.

In offline, everything is much simpler.