My big problem with Kimarhi is that he doesn't excel at anything, which goes against the entire Sphere Grid. With the exception of Kimarhi's tiny section, the Sphere Grid is incredibly focused, and making a hybrid character is nearly impossible. Whatever section you turn him down is just a copy of another characters, and an inherently weaker version, and moving him around with Teleport/Friend Spheres will have him wind up weaker than everything. He's not "versatile", because he can't switch from one role to another. You can choose one path for him, and the rest is just a straight shot through the grid, picking up whatever he gets from the chosen path, but almost always winding up inferior to the character who is already on that path.