Detective?

Alright, I know a while ago I brought up something about a character who is a detective, although I can't find that thread anymore. I have spent some time thinking more about what the character would bring to the table. He would be someone who focuses on vision control, it's something that is built into his kit. I was thinking that he passively could put down more than 3 wards down on the map, sweeper is on a shorter cd, wards recharge so he doesn't have to back to refill his wards ect. His ultimate ability would grant true sight of his target, but if he dies then the effect ends. Targets marked by his ult would take increased damage or maybe he has some kind of buff against them (IE, higher attack speed, his other abilities have special interactions with a marked target, he deals more damage, something like that.) Most likely would be played as a support due to his focus on vision.