If you absolutely, positively need a reliable companion then you want Haez. She is deadly, has a multi-faceted spell list, and carries the "Fanged Katana." The best spellsword in Skyrim. She also carries a torch, a bow, and has her own set of Glass Armor. [Standalone Modification]
+New Update & Fix Armor now craftable; Fixed texture errors. [No Other Modifications Necessary] Prepare yourself for a unique follower. She has her own hair, her own armor, and her own money. She is decked out in custom Daedric armor, she has a sword collection in her bra somewhere, she has beautiful, evil, little eyes, she does not set off traps, and she can level up forever!
cool