AI players will move in on loose pucks, but if there are a lot of CPU players in the slot they may have a hard time getting to them. Can't say that I've had more luck with "crash the net" than "overload" or "behind the net", but in theory I think crash the net should work better. What you have to do is to time your shots. You want team mates moving in on goal but you don't want them to close either, cause then the rebound will end up behind or under them instead of a stick length ahead of them. If your coing in from the side on the rusn and you take a low shot towards the centre or far side of the goal, when you have a team mate entering the face off cirlce on the other side, I'd say you got a good chance at picking up the rebound (if the goalie leaves one).

What it's really all about is evaluating the situations. Where's the opening and what kind of opening is it? Should you go for a one-timer, try to deke your way through, take a low shot for a possible rebound, or a high shot in an effort to score directly?

Here's a photo of a situation screaming for a low rebound shot. There's an opening in the middle that will guarantee a low shot getting through and at the same time, the left winger is skating towards the slot and there are no defenders on his side of the ice.

Let's look at the video as well to see the result.

Of course your opponents defensive strategy also affect how successful you´ll be getting to the rebounds. If they play High Pressure and Tight Point, you will get chances to pick up rebounds when the leave the slot to put pressure on your players. But If they're playing Contain Puck and Collapsing, you will find it hard to get to the rebounds. On the other hand they will block their goalies view, so a puck that goes through their human wall might just end up in net.