Is Conflux a broken castle?

In online play, Conflux is a fast-developing castle, which creates an imbalance at the START of the game. The +4 Phoenix increase is very important at the beginning... Later, as the game progresses, this is offset. But overall - fast, unpunished Phoenixes, the strongest ranged units of their class at level 2, fire immunity, the fastest heroes for acceleration (Moner and Pasis)... Plus four Phoenixes (or rather - five, because 20% are reborn) - all this gives a very significant advantage.

In offline play, everything is much simpler.