North Wall of Bethla Garrison

Enemies:  2 archers, 2 lancers, 1 summoner, 1 monk      Guests:  None

You could still try out the South Wall, but I personally prefer lancers to knights, since they can't break your equipment. The summoner here has strong summons, such as Leviathan. The lancers should be taken care of next, the monk shouldn't be too tough to deal with, leave the archers for last.