In the new Star Trek movie they had multiple warhead torpedoes that separated before impacting the Enterprise. Even in the first few minutes of the film the Kelvin was hit with three to five Photon torpedoes that separated into multiple projectiles. I counted five separated projectile.
Here is what I came up with.
Multiple Warhead missiles
SU’s Cost: Requires advaced launcher with Plus two SU’s per torpedo launch capable.
Power Cost: 20 + (10 per torpedo fired)
These weapons are warheads that break apart and will strike mulptal points on a target. These advanced weapons can inflict damage to key componets across the ship. A Multiple warhead separates into five projectiles dividing the damage into five different points of impact. This can be applied to Nuclear Rockets
Photon Torpedoes
Type - Standard Damage - Multiple points Damage per hit
Type I - 180 - 36
Type II - 200 - 40
Type III - 230 - 46
Type VI - 500 - 100
Type VII - 350 - 70
Type VIII - 300 - 60
Type IX - 250 - 50
Type X - 400 - 80
Quantum Torpedoes
Type - Standard Damage - Multiple points Damage per hit
Mark I - 400 - 80
Mark II - 450 - 90
Mark III - 500 - 100
Mark IV - 600 - 120
Mark V - 800 - 160
Nuclear Rockets
Type - Standard Damage - Multiple points Damage per hit
Mark I - 120 - 24
Mark II - 135 - 27
Mark III - 150 - 30
Let me know of revisions that you come up with.