They could tank in PvE also, Defy Pain worked there too; it's actually better in PvE nowadays. Warriors can also Obbi tank (use obsidian flesh and be immune to spells and take alot of physical damage). You just needed to dabble in some secondary professions. For tanks I'd recommend Dervish or Ele as a secondary. Dervishes have great defensive abilities that can make a warrior more tanky, same with ele. But if you wanted to be an outright tank I'd say W/E with earth ele skills. You can become a freaking beast.