User blog comment:Arbington/The Next Cycle/@comment-5267262-20120803203730/@comment-5267262-20120803211043

OK then... Returning to the overall point: the rate of armament would have to be much higher and happen much later to be effective against reapers.

Do not ignore the destroyers though. Destroyers would still require a substantial military power to kill in a space battle when its not preoccupied with fighting on the ground. Estimates would then be closer to 18000 sov class and at least a multiple of 90,000-108,000 destroyers (pulling numbers out of nowhere for how many destroyers to expect to be killed/made each cycle, '90,000-108,000' is assuming 1 is created per "lesser" race including quarians and krogan here and between 3 and 4 are destroyed.) This is probably a vast underestimate since they would be able to squeeze out more than 1 destroyer from many of the major races (hence the 'multiple of')