When you fight Ash as Zhin, the best thing you can do is shake her attention. Counter is generally useless against her weapon and Billow will only buy time. The best way to make Ash get off is by threatening the objective or bringing more allies.
Yagorath is perfect for massive shock pulse chains, she is easy to hit during her planted form and the shock pulse will chain into her team and deal good damage.
Barik has too many defenses against Atlas. His shield stops Deja Vu, or he can Rocket Boots to escape the rewind. He can also set a turret on the other side of your field, and rocket boots back behind his shield.