Got a descent modified starter deck, but having winning rate of 90% and above is hard (unless you keep playing against a lot of newbies or got incredible card/skill).
First of all, you're lacking good units. You don't have much units that can last long. Mercenary is good, but that's not enough. Everyone else die easily since they all have less than 50HP. By the way, I don't know what's "Der F."
Secondly, you should realize what's your weakness after you play some games. Realize your cards die so easily? Can't kill high DF cards? Frustrated by high level cards? When you start finding weakness, you should change your cards and/or playing style a bit.
Hopefully this helps you a bit.
Archer Scout is not like Exploding Spore.
If you're using Scout as a starting unit, her 20 HP can't keep up to use SP generating skill.
Dilate is good to add.