While the game works perfectly when the nr of ships on the screen is in the range of 0-100, the frames per second drops considerably when the numbers get much bigger. I have put all the detail effects on highest (and use 1600x1050 as my resolution). Which (downward) adjustments of aspect of detail settings will deliver the biggest bang for the buck (in the effects options screen)? In other words, what downward adjustments are not very visible, but deliver big performance increases?

I hope you will have some good suggestions.