<Snipped quote by ImportantNobody>
So... space pirates?
One side is space pirates, other side the galactic police (most simple way to describe them). Main problem with battles such as this is all participants need to be well versed and in agreement on the setting technology, possible magic system, etc, which is no problem to me cause I love that sort of stuff. I already have a space setting that does explain the need for close corridor space battles unless one side is woefully behind the times where you can destroy them whatever you do.
With faster than light communication you can easily see any long range attack and either move or deflect it. Most long range weapons are also weaker, so even if you do fire a laser that hits someone across the galaxy, they most likely laugh it off unless the laser uses absurd energy. The shields here care mostly about mass than speed, so someone kicking the shield does more damage than a tiny pebble flying at really high speeds into it. Firing large mass at high speeds into shields could be effective for sure, but that would use a ton of energy and could once again be dodged given enough time. The particle weapons, similar to Star Wars blasters, generally pack the best punch at closer ranges before they break apart. The particles, called Elzion, deal more damage than what their mass would suggest, but this is a rare exception.
Redirecting meteors and the like would be effective if they are not intercepted in time, but this is a huge crime, especially if directed at planets and even most bad guys obey these rules are else they are in for some angry ancient race to get off their butts and deliver severe retribution. Or everyone else unleashes their own doomsday weapons on them.