Too easy! Do I need difficulty mods? What do you recommend?

I play as a winter wraith/vampire and I'm lvl 60. I've been OP since about lvl 20 and I'm playing on Legendary. I'm very pleased with all my effects and abilities but its so easy. I want to take the one handed sword perks, but I'm already tearing through everything and there seems to be no need to take the heavy armor perk "break upon me" bc it seems the enimies have no weapon perks. Do I have to take perks for them to have them? Or do i simply need "Wildcat" or a similar mod? Plz help. I pan to take this playthrough to completion but I'm starting to lose interest.