I sadly do not have a mobafire account so I cant update. I think thresh is a really fun champion to play. His CC is incredible with Flay and The Box. Dark passage makes it easy for ganks. Just about all players play support Thresh but nobody likes supports. So I made this guide.
Hope you like It!

Seals of Armor are like the most awesome seals out there they help in jungle, solo top, bot, and sometimes even mid.
Marks of Scaling M-resist are okay but in the jungle the only thing you will be mostly up against AD only really Mid or sometimes Top.
Glyphs of scaling AP are pretty cool 3.06 Ap at end of game.
THE QUINTS OF AP ARE AMAZING IT IS LIKE A FREE DORAN'S RING AT LEVEL 1!

Jungle Route (AP)
Blue, Wraiths, Wolfs, Gank Top, Gank Bot, Recall and Repeat


Jungle Route (AD)
Red, Blue, Wraiths, Wolfs, Gank TOP, Gank Bot, Recall and Repeat

I like 9/1/20 masteries on AP thresh and 29/9/0 on AD thresh it's great!

Pros
Very Tanky
Underestimated Damage
Fun to play
Passive allows offensive Items
Great CC




Cons
Very Slow
Very Hard to play first time
Hard to land CC with smartcast
Need's a good lantern for a good gank
Slow Wave Clear

In Jungle do your route by clearing Blue/Red with smite
and in everything else bring them down to low life with basic attacks and E to last hist all of them

Hope you liked the guide! and you can change anything you want while playing it is your game after all!