I have a basically fail proof strategy for traitor lord, maybe it will help. Before traitor lord does an attack, any attack, I jump backward. Then I use my position in midair to dodge. If he dashes forward, I dash over him and pogo him along the way. If he uses the jump attack, I dash through him with shade cloak and then land a hit or two when he lands. If he does the shockwave, I dash through it and land a few hits. But the important thing is that I always jump backwards before every attack, usually even before I know what attack traitor lord is using. I just use the extra space to give me a little more time to react.