This is my kinda unusual build for thresh. It offers much mobility and poke and can carry your team trough teamfights if played well. The only problem is the lack of tankiness, so other champions in your team better be tanky.

With this build you need to change your mind on how to play thresh. He won't be the tanky support in frontrow, but he can boost your tanks into teamfights. To do that, Orange-Thresh has a high-mobility-kid. Use Righteous Glory for engaging teamfights, shield your team with Locket and save Talisman, till your team either needs an escape or more movement-speed for chasing.

Have fun!

Pros:

• High mobility
• High poke-potential
• Much money

Cons:

• Kinda squishy build
• You need to play thresh differently. Don't be the initiator - help others to be!
• Will be hard to play when your team is behind