Oh the irony...when you attack a ships subsystem you bypass there shields, therefore attacking the shield generator is useless. For those few unfortunate enough not to understand the words i speak, heres a example. Your in a battle, you attack the shield generator thereby bypassing the shields, you destroy the shield generator, now the ship has no shields, let me take a moment to say that this tactic is not of complete uselessness to you my little pet, you can now attack the ship itself and not the subsystem, this is good for vary large battles or encounters where you overwhelm the enemy and don't have to worry about losing frigate or higher class ships. What you should do instead of attacking the shield generator is attack the most powerful weapons first, this is derived from that age old RTS rule of consitrated firepower, which states thats once you destroy a enemy target you destroy that gun that was firing at you just a second ago, the less guns firing at you the better yes? Hopefully you contain at least a feeble mind to understand these simple concepts and derive there wisdom.