You can only fight ordinary Naga when you have a torch or glowing shield. But if you have a two-handed weapon, you can't take them with you into a fight. So Greatswords (or Maul) users are kind of doomed to get fucked. And they will have trouble fighting in the dark with Spider and other Nagas.
Also I don't really know how to beat the Number Won Hero achievement anymore. Armor Crusher is now in Haymaker and I really get beat up while I'm trying to use it at least twice, juggling between stances. While getting a Sunderer perk seems hard, because I can't level up if I want the achievement.
Yeah, and getting a perk just to use magic, really... I got myself a big Magic stat for Thief and just realized the magic isn't working.