Fire Emblem: The Sacred Stones/Chapter 1: Escape!

Have Eirika take out the Fighter near the starting point, then wait for Franz and Gilliam to arrive. Once they do, have them Eirika join Gilliam in the middle of the map and have Franz go to Seth near the starting point, because a group of enemy reinforcements will arrive there. Have Eirika take on the two fighters in the southwest corner, and use Gilliam attack the two Soldiers near the gate without leaving him next to Breguet. Then, have Seth and Franz join the others at the gate.
 * Objective: Seize the gate
 * Allies: 2
 * Recruits:
 * Franz (Turn 2)
 * Gilliam (Turn 2)

Boss: Breguet
Take a look at Breguet's attack and Eirika's defense, keeping in mind that he'll get a bonus against her because of his lance. If you think Eirika can take him without getting killed, do so, and rescue her with anyone if necessary. If not, try using Franz, who Breguet won't have an advantage against. If worst comes to worst, use Gilliam, who can definitely take a few hits. Don't use Seth.