Will to Live, Will to Power, Will to Grow

As has been previously discussed, Nietzsche's definition of Life, at #642 of the Will to Power collection, presupposes a concept of Growth.  Now, in #13 of Beyond Good and Evil, his grounds for replacing the Will to Live with the Will to Power as the fundamental principle is that "a living being seeks above all to discharge its strength".  But, again, the process of Growth is presupposed in the concept of "living being", and, furthermore, insofar as Growth entails the accumulation of strength, it is independent of, if not antithetical to, the concept of discharging strength.  So, at minimum, his attempt to reduce Schopenhauer's Vitalist principle to a more general one only exposes the inadequacy of the latter with respect to another Vitalist principle--the Will to Grow.