Which castle is the most difficult?

Who do you all consider to be beginners? I'm a beginner with two weeks of experience. I didn't understand half of what you wrote.
My opinion will, of course, be wrong, but it's the opinion of a beginner.
1. Conflux (Phoenixes), I might be confusing the Castles (their names), it's too easy, although it's been toned down here, but I still don't play with it, I don't like it.
2. Archangels, the most suitable Castle for a beginner, and it's built quite easily, and Archers are available right away, Angels are deployed quite quickly.
3. Golden Dragons. More difficult, but playable, especially if you're lucky and have a hero with Archers and the same in the tavern, build Archers and upgrade them, and the start of the game is very good, it can even be decisive.
4. Dungeon, Black Dragons. More difficult and expensive (in terms of resources, ambushes happen), but the magic in it is not bad (later on), Gunnar with tactics, Harpies (upgraded) performing no worse than Archers, and Eyes provide a quite powerful start to the game.
5. Giants. Expensive, often not built to the end, but for the sake of Ogres, you can play, it's a very good meat grinder with no counterattack.
6. Necromancer, I don't play, it's too gloomy. It's been significantly toned down here, so it's not worth using.
7 ... No opinion.