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Okay... get your frying pans and earplugs ready... I'm going to share my opinion about my favorite faction:) (maybe, considering the latest posts, it's not entirely relevant, but...)
So:
First place - Order;) Here we have a decent first-level unit, golems with good stats, and djinns, which don't even need commentary, and versatile magic, and much, much more... It's a pity, of course, that Lords are here. I just don't like them. However, you can exploit some ability when the opportunity arises, or you can simply put them in the Castle. You can never have too much money (especially me).
Second - Life. If you manage to level up the Paladin, you get a real killing machine. But even a simple Life Mage is useful - healing, blessings, and so on are always in demand. And the army... But in general, I don't like humans (because of the style - nothing fantastic, just angels:( ).
Third place is shared by Chaos, Nature, and Might:) I like Chaos for its fast start (thieves gain experience very quickly) and for the horses and little dragons:o Nature - a portal with various creatures, summoning, and so on, but it's slow at the beginning, and I'm not used to staying on large maps for a long time (although there are still thieves in the tavern:)). Might - well, just for the hero, who is a killing machine in himself, no worse than a Paladin, and for the first-level creatures, which help the hero become one at the beginning. And for harpies.
Fourth place - Death, but only because of the undead (don't get me wrong... Death, as it turns out, is very strong, and with vampires, which are already scary just by looking at their stats, and with resurrection, because of which there can be a huge number of these vampires... but I don't like the magic).
Don't kill me, I've only been playing the fourth game for a short time and I don't know much yet;) But I want to learn at least something. So, constructive criticism is welcome)