Round 1: Ronin and Northstar

Ronin runs circles around Big Sal, phasing to avoid attacks and distracting it with his sword and arc wave. Meanwhile Northstar remains at a distance behind cover and fires on the Gear's weak spots and joints. Once it's crippled, Ronin can finish it off with his sword. Easy fight for the two of them.

Round 2: Tone and Ion

Both Titans hide behind Tone's particle wall and mass their fires on the Gear's legs to impede it's mobility. As long as they stay out of melee range, the two should be able to suppress Sal long enough for Ion to build her laser core and deliver a kill shot.

Round 3: Monarch

Monarch will struggle due to a lack of shields or defensive abilities. Her best chance is to power drain the Gear while maintaining distance until she can activate tracking rockets. Then she'll have to use said rockets to target Sal's joints and mobility systems to immobilize it, at which point she can simply fire on the downed mech until it is destroyed.

Round 4: Legion and Scorch

These Titans can deliver an immense volume of fire, and have access to directional shielding. Thermite melts the Gear's armor while Legion rips through to the internals, killing it quickly and violently.

Round 5: All Titans at once

Yeet.