User blog comment:The Milkman/Indoctrination Theorists Say the Darndest Things/@comment-3469974-20121021084225/@comment-24174486-20121021223929

"If a Mass Relay is destroyed, it blows up. ... It's been established that destroying a Mass Relay destroys the solar system."

It's been established that smashing an asteroid into the Alpha Relay causes a supernova that destroys the solar system it is in. Note that an asteroid is not the Crucible and the Alpha Relay is not an average mass relay.

"How does the amount of ships in my fleet affect how well the Crucible works?"

EMS is based on the resources you have, the manpower you have constructing the Crucible, and the fleets fighting for the Crucible. Higher EMS means that there are more resources and staff to ensure that the Crucible is properly constructed, and that the fleets can protect the Crucible from taking damage that would impair its functionality.