If you want us to use the Red and White smites
White smite: Up the gold you get from smiting an enemy camp worth your purchase and risk of going into a potentially warded enemy jungle.
Red Smite: Add a movement speed bonus to red smite when casted on the target you're attacking and make it stack up with each auto. OR give bonus gold on champion killed with the smite effect on them.
Purple smite: The purple smite is alright right now but it would be great for it to give the user bonus armor when you smite a monster so the person can clear easier without losing so much HP.