Bane of Winter King Cold Primal Strike with the conduit. Done
Cold FoI with Farath is definitely good even with Shaman and I remember also theorycrafting Runebinder Vindicator with Rune of Hagarrad as main damage.
Northern Wyrm is very strong and I’d play 200% casting speed converted Chillspikes Vindicator because I play casters. Savagery I do not know but I guess it work too, melee or ranged.
Also just using a bunch of items with global Lightning to Cold makes a strong Cold Vindicator ouf ot the box and you can just Storm Totem / Maelstrom / Storm Box / Chain Lightning your way to success.
Cold Vindi is far from a meme and easy to make imo perhaps it’s just not made to too often because other classes are optimal for all those builds and these are just a bit weaker variants.