So I like DK a lot, but I am unsure of how good or bad armor mixing is in this. My armor stat is "overcharged". I have full heavy armor, but I was thinking of mixing a few pieces of medium to give me crit and stam stats. Is this a good idea, or no?

On another note my skills are Igneous Weapon, Stampede, Unstable Flame, Fiery Breath, and Dragon Blood. I think it is a good combo, but I just want some input. My ultimate is Magma Armor.