Add "Prime: Sturdy Step" that is an iframe, remove iframe from "Fierce Disdain" and make it full super armor, "Fierce Disdain" is unreliable as an iframe. Shorten "Mountain's Echo" to 12 second cooldown down from the 22 second cool down it has now, 22 second cool down is a very outdated movement cooldown with every other class having so much more protected movement and gap closers. 

protection and mobility Improvements to Sturdy Step  would be nice, should keep iframe on Fierce Disdain tho.

To add onto this topic I also suggest having an increased animation speed of Omua's Objugation, and making it so it does not animation lock you on the ground for a second before allowing another movement to occur. Such as allowing an instantaneous flow into the "Prime: Study Step". I bring this up as having a skill that increases your movement speed by 10% for 10 seconds is wonderful, but you only actually get 8 seconds out of that 10 seconds due to the slow animation and skill lock time adding up to 2 seconds.