Also Niefelheim with a traditional high bless strategy, is pretty simple to play (at least against lower difficulty AI). Really any giants will do you well, but those 3 are the simplest. Just make sure you put Nature4 on your pretender at the very least, but you'll want to experiment with your bless by placing a lot of magic on your pretender.
Also, bear in mind that getting too used to giants will make normal troops seem awkward when you try other nations, and you'll be shocked by their attrition rate compared to giants.
