[They were usually free willed and unpredictable. They could make their opponent face a difficult problem right at the start of their encounter.] This is my go xD
I only understand the last part 首先便给敌方出了一道难题。 If it’s the first two parts u need help with, well , good luck
Usually, they act according to their subconsciousness, counter the Routine acts with inspirations, which made a tough problem for their opponents. I think that "以无形对有形" is a variant of “以无招对有招” . 招 means a typical movement of Kongfu here. This sentence mainly described the behavior of some Kongfu masters. They are too skillful,their movement is free-styled, and the opponents can't figure out the pattern .