https://docs.google.com/spreadsheets/d/1rzakUshmG2M7r0_liTbbkKj5JXYX-V6q8mDC3VXfV_I/edit?usp=sharing

A friend and I have been rather enjoying GalCiv 3 but we could not find base stats for the weapon systems that were up to date. So we decided to figure them out ourselves. This data was gathered using a custom race with no miniaturization modifications and choosing maintenance and cost reduction each time for specializations. We then calculated the cost reduction out of the value we got based on simple addition and sometimes trial and error against a second save file. 

Our conclusions:

1: Doom Rays look OP

2: Photonic Torpedoes may need to be looked at. their balance in that teir seems to be off.

3: Prototype and normal resource cost weapons may be overpowered for their cost (ie: having enough duranthium to make entire fleets with duranthium drivers)

(Prototype Elerium beam is roughly = to a phaser pod)

(Prototype Antimatter missile is roughly = to a Photonic Torpedo)

(Prototype Duranthium Driver is roughly = to a Quantum Driver)

(Antimatter Missile is roughly = to a Photon Torpedos)

(Duranthium Driver is roughly = to a Singularity Driver)

On the defensive stat front: We were unable to get correct cost values for a few of the high level missile defense. There were not anything near what was displayed.

If you would like to mess around with the data yourself you should be able to copy the spreadsheet from the viewing link