Modifying the mystic strike to be a discharge of force is fine its mostly about flavor, imagining it a blue green energy attack versus an invisible one. In either case, I dont see an issue with this.

Hidden strike parry: The spear in its shortened state is the same length as the blade, and this would basically be the spear held at the balance point, so shorter than the blade, flat against the inside of his harm. So when he blocks the strike with the blade he steps in shortening the combat range and stabbing with the spear stiffened against his arm, besides the spear is easier to thrust naturally.

Dropping healing aura is fine by me.

Ill make the updates and repost it.