Recently I had a Galactic War match that involved a fair few nukes. Thought it might be useful for people if they want to study the balance, especially the timing. Note: I had a tech which reduced the cost of superweapons and nukes by 75%. http://pastats.com/chart?gameId=220966 May not work since the game froze and crashed on the victory screen. Which would make the thread kinda useless but... Try it anyway.
Found it anyway, that really was a lot of nukes. Nice roid win by the way, although shame the planets just up and dissipated rather then brightly vaporizing.
Honestly I should've concentrated more on that Halley planet. If I'd realized the only thing stopping me was one little outpost with a single nuke launcher it would've ended much faster but oh well.
So the regular cost of nukes is 50 000 and the tech reduced that by 75% so that makes nukes cost 12500 metal. Meh, close, but still costlier than RCBM nuke. I regularly play with nukes that cheap. The only change is that an RCBM anti-nuke costs 1500 metal.