Shield Rape
A strategy commonly referred to as "shield rape," is an attack where the shielding value of a player's ships is greater than the attack power of another player's ships. This is one of the greatest attacks you can do, as you will lose very little to none of your own fleet. Larger players can wipe out millions of enemy fleets in single shots while taking zero losses to themselves by using shield rape techniques. So here's some common ones:
Heavy Cruiser
The Heavy Cruiser in large numbers will decimate fleets primarily composed of fighters, corvettes or recyclers. This is useful to stop attempting "debris sniping" by enemies while you are sitting on a debris pile. Usually, they will send in small forces of corvettes. Simply pull away everything smaller than a Heavy Cruiser and fire away. You will receive next to no losses, and your enemy will suffer greatly. Do not try to do this on destroyers, you will be a sad panda. Unless you use...
Battleships
Same idea as the Heavy Cruiser, but now you can do it to destroyers, bombers and (if their tech is fairly low) Heavy Bombers. A small group of battleships is very frustrating for someone trying to snipe recycler fleets with destroyers, or is excellent for taking out larger fighter waves over a base who's defenses have not yet regenerated.
Dreadnoughts
Please do not use these in an offensive fleet. Yes, they can shield rape some things, but it's a waste of credits. For real. Dreadnoughts don't do much that can't be handled by either battleships or Titans. If you have Dreadnoughts, Titans shouldn't be far behind anyway. Don't do it, it makes baby Jesus cry.
Titans
These are quite funny, as they can shield rape everything smaller than cruisers and even cruisers themselves in small numbers. Use them when fleets have NO Heavy Cruisers in them, as it takes less than 100 HC to kill a titan in one shot....and that's just sad.
Leviathans
The mother of all shield rape. A player who knows what they're doing with a dozen leviathans is near unstoppable. Keep in mind that it takes around 600 HC to take down 1 leviathan....JUST ONE!!! So shield raping is quite common with leviathans. Most times, you will try to find a fleet that is off base defenses/cc bonus (usually at a JG somewhere). Leviathans are very useful in "crashing" another guild's JG.
If the fleet has less than 600 HC, and not much larger than an HC, it can be taken down with just straight leviathans. But that is hard to find, so usually players will add extra ships in for armor to "soften the blow" to their levis. This is usually done by adding in 1 titan or 200 cruisers, or 10k fighters, depending on what works best in the situation. Usually, 1 titan is the best option. You will lose the titan, so don't add more than 1...but it will save you from losing a leviathan in most situations where otherwise you would have just barely lost one. And which is better? Losing 50k in fleet, or 200k in fleet? Hmmmmmm....