Early Game

This is where I feel Ad TF really excels. He adds the pressure in lane of an extra stun, no matter who the support is that you are laning with. And not only that, but going AD makes it so his stun isn't just great for initiation or running from fights, but will make the other adc you're against think twice when he gets to see the damage that comes from it.

Ding! You're now level 2 and what does that mean? A small boost of atk speed, and that much more damage! You will be able to last hit and every 3 hits is like Caitlyn's headshot, just way faster to get. You can do so much at this point, like yellow card for second stack then boom! Even more damage on your next attack. This simple combo will out harass a lot of adc's at 2.

This is the only combo you will have through out all of your laning phase and so you must learn to make it as effective as you can. Once you get more atk speed however you wont have to worry about stunning on your second stack, because you will be able to get your 3 hits off no matter when you land the stun.

Mid game

You should now have more atk speed around this time so as said your harass will be alot easier to get off effectively, however since you only have 2 abilities and a nerfed ult that will only reach mid lane you basically have to use it as a support, to get view of the enemy in crucial situations (note that you will still be extremely effective for dragon fights). All around you will see that Mid game is pretty much the worst for AD TF, but late game really makes it worth it, so at this point keep your farm up, keep pushing and hope that if a team figth arises without you that it is either at dragon pit or in mid lane.

Late game

This is what makes AD TF worth it! Most team fights arise at dragon, baron, or mid in this point which will make your ult effective still. ADC's can push lanes fast and with a free teleport ult into any teamfight you are free to just push and push bot lane all game and if a big gank comes around, a well placed ult can be a great escape mechanism. With your e you will be hitting harder than other adc's such as Ashe, Graves and Miss Fortune (maybe even caitlyn), not including that extra stun that your bring, that when going AD HURTSSSSS. You will be a giant threat from pushing, to randomly appearing in a 5v4 if they send one to take you on. I cannot stress this enough though that once you get your Q at level 13 that you should never use it. It will just be a waste of mana but for this reason you will basically have 3 abilities, but you make up for this with the choices of your w.