Scorpion Counters and Strengths in Age of Empires 2

Always use spread formation when engaging Scorpions

Any fast mounted units (cavalry) will counter Scorpions.

Avoid fighting scorpions in narrow areas, their missiles penetrate multiple units.

Use spread formation when fighting against them to minimize their pass through damage.[1]

Fast mounted units like cavalry are their absolute primary counter.[1]

Avoid fighting them in narrow chokepoints where their bolts can hit multiple units.[1]

Bombard Cannons and Onagers can easily destroy them from a safe distance.

They are excellent at shredding large masses of slow moving infantry.