Rikktor and Stygian Dragon charge up their EQ with movement. When i do Stygian Dragon on my Disco/Tamer, and my RC+AP Frost Mite tanks him with Consume up and me vetting, he tends not to move (Cold Wind ticks do a good job of keeping the Stygian Dragon aggroed on my Frost Mite), and oftentimes doesn't get a single EQ off before my guild kills him.
If you're trying to "joust" Rikktor with Hit & Run tactics, he's going to move a lot and get EQs off like mad. If you can stand and tank him (such as with utilizing Feint), he gets a lot less EQs off, if any. Fencing's Leaf Blade has Feint and AI, while Sword's Daisho has Feint and Double Strike.