I can definitely tone him down, I used the term "superhuman" to show that he could use the basic skills beyond what the normal soldiers and Inquisitors used. With him killing 
'several' Inquisitors, since I didn't specify the number I can understand why there is confusion. The actual number is somewhere in the ballpark of 2-4 including Father Mikhail and it was not intended to be an easy fight. I will work on it and find a different choice of words for his abilities.