Which is stronger – a whale or a cat?

In terms of combat stats, the Titan is better.

But the Archangel doesn't spoil morale, blocks shooters, grants first turn in Dragon Fly Hives/Dragon Utopias/Firebird Sanctuaries and can resurrect small losses. In other words, as army support, it is far more useful.

That's why imho, Archangel on all templates for all towns.