Hypersonic Assault allows Tachyon to move through Hazard spaces without triggering them. Does this include the space she lands on? For example, let's say she Hypersonics through an impulsion turret, and stops 2 hexes past the turret, which is still inside its radius of 2. Does that trigger the turret? I'm playing it as "not" for now, which makes her great for BB scenario 2. Hypersonic + Unrelenting makes for painless turret wrecking.
Final detail - I am also assuming that the Hypersonic effect does not keep her safe from end of the turn Hazard attacks.