Pretty good question, ive looked through every wand in the game for smiting and the only ones that are dyable are a Wooden Boar Scepter, Asuran Scepter and Norn Scepter.
Asuran is fantastic to dye, I fully reccomend it. As before mentioned, the Official and Unofficial wiki's show what is and isn't dyeable, but you probably knew that already.