I was thinking about classic medival, but in the end, i decided that characters wearing plate armor would have too much of an advantage, being impervious to almost all hack & slash attacks, save for a few weapons such as pollaxes, yet also allowing enough mobility to fight on par with a lightly armored opponent.

So i decided that it's either no plate armor, or add superhuman power. Tier 2 by the Everlasting should be enough in my opinion.