I use no custom weapons honestly... Most custom enchantments I do are on armor/jewelry.
A Stalrhim Claymore Dual Enchanted with Chaos and Frost Damage. I call the Weapon "Wrath of Nomeg-Gwai" in honor of a Frost Atronach in Morrowind.
I always make the weapon after My characters are Master Smiths and Enchanters, and take advantage of Azhidals' Gear and Apocrypha Powers to make My End Game Weapon. The Frost Bonus on Stalrhim Weapons combined with a Trifecta with Choas Damage makes one hit kills very possible on almost anything but Kaarstag, the Ebony Warrior, and Higher Tier Dragons.