Races and Character Classes

Well, you're wrong about the darkness. The strength isn't in a mindless Armageddon, but in Sharpmetal (fragments of metal, or something like that in the Russian version), which deals incredibly high damage to a single target. Light magic isn't simpler, but more convenient for those who like to fight hand-to-hand (especially for you, with two Knights, that's no joke), while dark magic is more convenient for those who like to cast spells.
And if you want to make things more challenging, play the sixth game on a speed run without leveling up.