If you want to keep the idea of using a Dragon Priest mask, I'd recommend Raghot (the 70% stamina boost will help you sprint longer and perform more power attacks)
If you're okay with any kind of helmet, I'd suggest a regular Elven helmet, or an Elven helmet with a Fortify Destruction enchantment.
Also, Stormfang is part of the Dragonborn DLC, so for a replacement, I'd suggest any greatsword that has a Shock damage effect to it. As long as it isn't iron, you should be okay.
If you want to keep the idea of using a Dragon Priest mask, I'd recommend Raghot (the 70% stamina boost will help you sprint longer and perform more power attacks)
If you're okay with any kind of helmet, I'd suggest a regular Elven helmet, or an Elven helmet with a Fortify Destruction enchantment.
Also, Stormfang is part of the Dragonborn DLC, so for a replacement, I'd suggest any greatsword that has a Shock damage effect to it. As long as it isn't iron, you should be okay.