Angels and paladins – how to use them? There are also discussions about them here.

Who knows how many others have good speed and initiative... Why are they now being classified as "invincible"? And a truly powerful mage can only be a Wizard, Dark Elf, or Necromancer, but definitely not a Knight (rare exceptions are often found in map structures that increase knowledge and magic power). Of course, this isn't a problem – you can buy one of them in the tavern and level them up, but in my opinion, a Knight should lead the Haven army; I think it's more beneficial.