Dragon Knight is a pretty balanced but powerful carry and is sometimes played as a mid hero. However, this is my guide for a laning Dragon Knight carry. He is best played in the top lane for Dire or bottom lane for Radiant, the safe lanes. This build focuses on a more aggressive Dragon Knight by getting a Soul Ring to harass with Breathe Fire then focusing on damage items earlier on and attack speed later on. Let me know how the build works out for you, constructive criticism always appreciated!