[Saxon]

If you have access to earth magic, there are some good spells that destroy armor. Once those are cast, it is easier to hit and damage the enemy, which helps a lot. They are also area of effect spells, so you hit a lot of them. Helheim have shields, which makes the arrows next to worthless. If you can get wind guide or (much better) burning arrows, they become somewhat helpful. However, you may not have access to those magic paths as Atlantis…

I tend to have fairly long, grinding battles with them, even with the magic. Spells that boost your morale or defense help keep your troops in the fight long enough to wear them down. I hate it when I get rid of most of the glamour, but don’t actually kill many of them. Use large numbers of troops in each unit, it helps with morale.

Put these ideas together with those mentioned by other posters and you can beat them. There is not single “magic pill” to win, you have to make sure your shoes, belt and tie match to win the “glamour” war!