Hello I am Mew1551 and I main TF. I normally don't play my main in normal matches but I do enjoy playing around with Champions' kits and I found this on TF. (this is my first guide so please bear with how low quality it is and if you have questions about my sanity on this build then go ahead and ask ^-^)

Twisted Fate is a great Mage and also works as and ADC, but this isn't an AD guide :P regardless I looked at TF's Kit and I saw Jungle Potential. There are some pros and cons to this, but then again there are pros and cons to any jungler.
Pros
-CC, Sustain and Damage in one ability
-An Ult that helps gank and counter-gank
-Can beat other Junglers like Lee Sin
Cons
-Very squishy at first until he gets Trinity Force
-Needs Help to take on Dragon early game
-Requires some skill with Twisted Fate

I recommend starting like any other jungler would, and then after your first recall start building toward Trinity Force since It gives TF a little bit if everything. after Trinity Build Nashor's Tooth for the attack speed and AP after Nashor get boots and your jungler item with the Magus enchantment. after those build Deathfire, Sorcerer's and last of all Void Staff. I should also admit that if you do not want to build Void or Deathfire Replace one with Zhonya's for the small armor.

For Runes I decided for some Armor Magic Resist and also AP, mana, and Attack Speed because it helps TF alot.