Final Fantasy Tactics Walkthrough

This battle can be difficult because all of the Chemists are equipped with Mythril Guns that do a lot of damage and have good range. You'll want to bring someone like Agrias or even better, Orlandeau, to hit them from range and do a lot of damage. Summoners are okay here, but someone with Holy is even better. Make sure you can heal damage and revive people, because they can go down pretty quickly if they're targeted by multiple Chemists.

The sightlines of this battle make it tricky, but you can use it to your advantage by taking out the enemy in places where it is hard for their companions to heal them. Focus your attacks on a single enemy at a time, because you'll want to try to take one out each turn to avoid a large round of healing. Even better if you can get your party into blocking positions so that healing (or reviving!) is impossible.

You will want to move fairly quickly up the ramp to take out the upper force before they can cause too much damage below. Beowulf will perform well as a guest in this battle, though you may end up wanting to knock him out if you want to farm this battle.