Twisted fate and what i think could be changed.
Passive, Loaded Dice - Upon killing a unit, Twisted Fate rolls his 'lucky' dice receiving anywhere between 1 and 6 bonus gold. I think Tf's gold passive is fine, it doesn't really need any changing.
Q, Wild Cards - Twisted Fate throws three cards outwards in the target direction, dealing magic damage to all enemies they pass through. One card goes exactly in the target direction while the two others go in the outer border of the semi-circle. Right now the ability costs far too much for the amount of damage it does while also being so easily dodged by anyone who isn't stunned, and considering tf's combo he isn't exactly dealing the most damage nor the most efficient, costing 60 / 70 / 80 / 90 / 100 Mana and dealing 60 / 105 / 150 / 195 / 240 (+ 65% AP) damage, i would change the ability to be, upon casts twisted fate retrieves 3 cards from his deck and upon recast he throws them 1, upon recasting again he throws one,etc at a time, dealing 40/70/100/150/200 (+55% AP) damage, costing 50/60/70/80/90 mana, the last thing i would do is increase either the size or the speed of the ability i feel this would give tf a poke that isn't as difficult to lane without using a gold card.
W, Pick A Card - Upon cast Twisted fate begins cycling through his Blue card, Red card and Gold card, upon reactivation twisted fate locks in one of the three cards and throws it the next time he autos costing 40 / 55 / 70 / 85 / 100 Mana, for blue card the damage dealt is: 40 / 60 / 80 / 100 /120 (+ 100% AD) (+ 50% AP) and the amount of Mana Restored is: 50 / 75 / 100 / 125 / 150. For red card the damage dealt is: 30 / 45 / 60 / 75 / 90 (+ 100% AD) (+ 50% AP) and the slow is: 30 / 35 / 40 / 45 / 50%. For gold card the damage dealt is: 15 / 22.5 / 30 / 37.5 / 45 (+ 100% AD) (+ 50% AP) and the stun Duration is: 1 / 1.25 / 1.5 / 1.75 / 2 seconds. now this ability is the bread and butter of tf, however it is most certainly not the bread and butter of ad tf, considering throwing a red card at someone in an attempt to kill them (if they aren't low) will get you killed, tf has one mobility option meaning he can't run in throw a q and a card and get out with his life as many other midlaners can, the ad scaling on this ability is practically worthless and is the biggest problem i have with the ability, they should bump up the ap scaling to 60 or 65% and completely remove the ad scaling, attack speed tf is the only viable form of ad tf so if anything giving e more attack speed would be better speaking of which.
E, Stacked Deck - Passive: Twisted Fate gains bonus attack speed. Passive activey thing: Every fourth basic attack deals bonus magic damage Bonus attack speed: 10 / 15 / 20 / 25 / 30%, Bonus Magic Damage: 55 / 80 / 105 / 130 / 155 (+ 50% AP). If riot really wanted ad tf to be less of a joke then attack speed is where it's at, buffing the attack speed and lowering the bonus magic damage or the scaling should do fine, though if anything ad tf is the biggest joke, so the ability should stay unchanged.
R- Destiny - Twisted Fate gains and grants his allies True Sight icon true sight of all enemy champions for a few seconds and, after a 0.5 second delay, can use Gate Gate once for the duration. Second Cast - Gate: Twisted Fate channels for 1.5 seconds, blinking to the target location upon completion. the ability costs 150/125/100 mana, the cooldown is 180/150/120. the true sight lasts for 6/8/10. now tf's ulti as an ability is fine, if anything i'd maybe make the channel slightly faster like 1.25 at most or 1.30 secs, other than that i would change the cooldown to be so damn long at level 1 making it 150/120/100 would be a lot better or even 160/130/110.