Ryker saw the big Skeleton coming, he was already ahead of Xune's instructions as he already began to retreat. Using his speed to back off from the skeleton's greatsword, keeping his sword up in guard as he backed away from the skeletons keeping Coherency to Xune as he moved back.

Actions - 
1 Using his mobility to evade the larger skeleton's greatsword
2 Taking a defensive position
3 Moving with Xune to hold position.