Dortmund is not a hard problem to solve. They are a counter attack team. They press well. Their back line is slow and bad and their defensive mids offer no protection.
If we go there with Llorente trying to hold the ball up and Pirlo trying to play regista in between our CBs we will be properly destroyed. As soon as you concede one to that team it becomes even harder as you have to open yourself up even more.
FFS, just put in a tape of Simeone's Madrid and copy that for one match. Even if you copy it to 50% you can beat Dortmund.