Tress's Team Comp Patch 10.8

With the buff to the Cait's ability, Spear of Shojin is a very good item for one-shot your enemies along with Chrono's passive attack speed and sniper trait so she should be your core.
Shen may be replaced with Wukong if you wish or he don't appear in the rolls. Thresh/Miss Fortune too, but i prefer choose Thresh for Mana Reaver and 4 Chronos. You can build items as you wish. Ashe with Shojin is also recomended to spam her ability and the sniper bonus damage too. Shen, Rakan and Xin should be your front line yo absorb the most damage and let the snipers and Kassadin deal most damage as possible.