Totemic Ward's cc immunity prevents heavy blade's slow, and he can ghost walk to avoid heavy combat's burst. His ult slows the enemy, therefore his ult counters your ult.
When u hear the Kinetic Burst sound or see the animation, use your shield to tank the next hit.
For her dash use Commander's Grab, that has a bigger hitbox, in the direction she is looking.
And when she ults, use your ultimate to take her out.