There must be a connection of what you kill against the resource value.

There is multiple variation for the point ratio but you must never face an army with more than 10 times stronger than you because you will loose very much for less point.

The best approximation I can tell you is 60k of army = 1000 pvp point. More stronger you are in one attack, more you limit the army difference and assure to have most pvp point.

For exemple, with a ten million attack on a 1 million defence, you will loose less than one million OFF but you will win 15000 to 17000 pvp point for sure and kill every one in defence.

The amount of PvP points earned from a battle depends on the battle itself. Players defeating other players in massively one-sided battles won’t receive any PvP points, but a player who takes part in an even, hard-fought battle where both sides take losses will be rewarded highly. If you see that you haven’t received any PvP points after a battle, it is because either you haven’t managed to kill enough enemy units, or the battle wasn’t fair enough to begin with and you haven’t sustained many losses. This is to stop people bullying their way to the top of the PvP rankings by defeating weaker, inexperienced players.

Yes, defense earns you more points, especially when the fight is balanced.

A long time ago, somebody attacked me with 4 times more off than my def, so he pretty much destroyed me, and we almost got the same number of points. Had he had only twice as much, I would probably have earned significantly more points than him.