Kakashi looked at Uchiha Douhuan. Come to think of it, their situations were quite similar in a way: both possessed the Sharingan, used Lightning Release as their primary means of attack, and also had some proficiency in swordsmanship.
Therefore, Uchiha Douhuan should have a way to help him improve his strength.
"Although you make very good use of the Sharingan left to you by my kinsman, you are still too constrained by the ordinary fighting style of the Uchiha."
Chapter 90