Whenever barik ult, just hold your shield in front of the turret, that negates the damage. (unless it breaks)

Abuse your firerate, get on the high ground, headshotting her isnt hard.

Use your ultimate to keep people away, the optimal time to use it is overtime on center. in case of pushing the payload, you can put it in front of the cart.

In case you have battering ram, its easy to counter his ult just await until he is coming at you and start your shoulder bash.