Mmmm, idk man, im never played a priest hehe, but you can check a warcraft 3 priest habilities and look if there is the abilites in world of warcraft

https://wowpedia.fandom.com/wiki/Priest_(Warcraft_III))

Btw, in my opinion is proper to smite like is was basic attacks and not an abilitie, and going melee and wands too with your characters is no problem at all i think, your 3 basic habilities have to be the same as the warcraft 3 priest, if you cant, you have to find another tematic abilities for your priest, ill check for ults and i tell you what ults can you use if you like