Camelot

You pretty much just have to spam archers, Euryale is a pretty good choice because of her np gain and extra damage against sabers and males.

Study every stage. Have AoE servants each classes since the mobs are strong. Always try to counter class, don't depend on Zerk (other than Herc) or Jalter (without Merlin) too much. Each bosses need strategies to beat them, they have strong gimmicks (one has AoE NP AND the ability to use it every single turn, one messes the class affinity, etc.), counter classing them is a must, unless you want to die.