Final Fantasy Tactics Walkthrough

This will be an easy battle if you bring along Cid, or even have anyone using his Excalibur. Of course, that weapon is a Knight Sword, so not every unit can use it, but it's powerful enough that you'll want to consider adjusting your roster to accommodate it.

Take out the Ninja first with whatever method you prefer, then systematically take out the rest of the enemies depending on how close they are to you. Of course, the range of the Archers can be an annoyance, and you may wish to shift focus if you find they are doing too much damage, but otherwise, simply fighting your way uphill as a unit should be more than sufficient.

This strategy is largely the same even if you have increased the challenge for yourself by declining to accept Cid in your party, or by deciding not to use him or his sword. In that case it's just more likely that you'll be doing more healing as you'll have less opportunity to one-shot the ranged attackers.