Twisted Fate viable for solo Que?

He can be, yes. If you're playing him as AP mid, run flash and ghost since he's not exactly the most mobile. For your boots enchant, go with either homeguards(since it synergizes with his ultimate), or go with Distortion to enhance your summoner spells. I've also seen the death by a thousand card cuts adc build, with botrk as the first item, statikk shiv as second item.

Perfectly viable.

Lichbane and Zhonyas are pretty essential items on Twisted Fate...despite what you might think...Boots of Lucidity are also incredibly useful. Do not forget to blue card to restore your mana...that's why boots of lucidity are so incredibly good...more "Pick a Card"...more mana regen. Deathcap, Abyssal's, Void Staff...even Rylai's as a later item...all viable.

When you hit 6...start abusing that ultimate. Be sure to have your stun ready before you ult in...look for those pics. Also don't underestimate using your ultimate for vision...sometimes it's better to pop it for true vision control to know when NOT to go in.

Kinda. In my past 20 or so matches (this being at around the silver-5 level), every other match has been either yasuo or azir. If you can build sets around them/abuse your ulti to get behind them, you should be fine.

Twisted fate is (in MY opinion) the STRONGEST splitpusher in the game. My personal build starts followed by , and if your e is up, your w will almost 1 shot them. I than build with homeguard, followed by a . The next 2 items are up to you. I personally like to build and , to give him essentially a tanky feeling, and a chance to comeback from a splitpush gank. use your blue card on turrets and with Lichbane itll do 1/4 the turret's hp per card. TF is by far my favorite champ, and i hope this helps.