Sizing a guided-missile battlecruiser's VLS battery

How many VLS cells should a guided-missile battlecruiser carry, and how should they be divided among missile types?

The mix should follow the threat and mission, but a ship large enough to merit the battlecruiser label would likely carry several hundred cells and emphasize fleet air defense as well as strike weapons.

The threat and mission determine the split between surface-to-air, anti-ship, and anti-submarine weapons. A Western ship using Mk 41 or Sylver vertical launch systems could adjust its missile load for each deployment. The Soviet Kirov design offers a historical guide to the roles of a very large missile cruiser, combining a heavy anti-ship battery with fleet air defence, powerful radars, and command facilities. A proposed scale of 400 to 600 cells would justify the increase beyond an ordinary cruiser by providing substantially more capacity. That figure is a suggested requirement for the hypothetical ship, rather than a statement of Kirov's actual missile-cell count.