In the above video you can see a real world example of EVE Online Elite Level PVP...
Imagine there is a 100 strong herd of BattleCruisers passing by your small fleet of 10 Battlecruisers.
There's no way you win this fight is there?
You just need to Isolate one or even several of the herd like the Cheetah did.
One of my favorite ways to do this is to sit at a "tactical" safe spot 200-400km off the gate they are coming in through.
Then as they start warping off, you warp a interceptor down to the gate at zero.
The Inty then tackles one of the last targets to warp away and the rest of your fleet (which was aligned) warps in for the kill.
The targets "herd" is in warp and can't stop to help their friend... They must first exit warp on other side of the system, re-align, and then warp back across the system.
By the time they do this you will probably have not only killed the target but looted and salvaged the wreck just for laughs.