I believe Kartana is too frail to set up both tailwind and use one of its moves with a Life Orb boost. It really wouldn't last long, unlike in Singles, where it is probably more doable thanks to the high amount of switching in singles formats. Besides, Leaf Blade is the move I'm going to be spamming the most in a game. Smart Strike is mainly used for Fairies and Amoonguss. I feel like Kartana is already strong enough.