A few alterations to Corban's plan would be necessary. Very clearly they did not have Shin's best interests in mind, and that was unacceptable obviously. So let's pick this apart and make it more ergonomic for our favorite homicidal maniac, shall we?

For instance, as the sister blades made contact with his Spears they erupted like a bullet striking water. Their own speed working against them as his staff heads turned fluid and enveloped them. Even if they could cut through them, they would find no province against the tar-like form they took in response. 

Entrapment the defensive blades was merely the first step in a three part plan. You see, earlier there had been a hilarious misconception that had driven the tide of this battle since the beginning.

Corban, or Crystalle as they were calling themselves now, believed that Shin's mind was not as powerful as tool as her own. That was a gross misunderstanding, because Shin had already seen the glaring difference between their abilities.

Step two was to meet her halfway through her charge towards him. But it was not a bodily movement, Shin extended his right arm forward in what looked like a wide haymaker. As his arm swung forward another branch of his staff extended forward. It rapidly grew and hardened into a clawed hand about three times the size of his other hand.

This clawed hand was on an intercept course with Corban at the peak speed it was capable of, the speed of thought. The speed of Shin's thought, four times that of a normal person. This hand would strike her in seconds if she were standing still, let alone if she continued moving towards him.

And part three? Part three was simple. The remaining mass of the staff would extend upwards towards Corban and angle itself so it would prove a barrier between Shin and her. The staff body and his pseudo arm would merge on contact with itself. Even if she did move around it, Shin would be ready with a devious trick of his own.

Normally people would go for his right side, especially now. Missing eye, missing arm. But the problem was just how obvious that was, and Shin knew how smart Corban was. Knew they would go for something less than obvious to try and catch him off guard, so even as he made his offense he readied his footing. Placed his left foot against the nearest spear and loosened his right foot up.