Sorry for wasting your time.I found that on walkthrough.I was so dumb.Thnx for the tip.i am going to keep that in mind from now on.Though i only got D.Because i just wanted to finish it very soon.

Matrech Coast is a toughie, indeed. In my second game, I had plenty of experience with the battles (second playthrough, after all) and every possible recruit by that point, and still only got A/B-rank by mere luck.

One of the most useful tips for the strategic battles in Exit Fate is probably just to abuse the Sorcery unit option. Although the stat chart will say that you'll lose 1-3 points of ATK and DEF, there seems to be a glitch that restores your decreased ATK score upon entering battle, so you can manage to get some really powerful Sorcery units that way. Once you get an effective unit setup, just play the battles out really defensively, luring out one target at a time, if possible.

Also, remember that as a unit's MEN stat drops, so does their overall effectiveness in battle. (It won't show in their stats, but it becomes quite clear when near-dead units are dealing almost no damage at all, and receiving a lot, regardless of stats.)