Which level 7 creature is the best, and why?

Absolutely, Zhen! An increase in stats is a good thing :), and I won't even mention the turn order priority, but in my opinion, their main advantage, besides everything listed, is fire immunity – in most game situations, they can compete with many level 7 units... ;)

I don't think so – dragons (gold and black) also have immunity.
And yet, Phoenixes are strong due to:
1) Quantity * HP
2) Speed (21)
3) Easy to build
4) Fire immunity
5) Resurrection
Exactly in that order, and no other!
Of course, it's great to have Armageddon, catch a powerful enemy near your castle, and attack, cast Haste, and run away :) 5 times, and the army won't be so scary... But the main thing is not to get caught in Shackles ;)
But in most cases, I don't need Haste, and I just need speed and quantity...

Ps What's your name?:D You keep saying Zhen, Zhen... and I don't know what to say:smile42: