If you have never played long pips before, start with ox (i.e. no sponge).
I agree with the other poster. Putting 1.6mm sponge on a long pips actually defeats the purpose of having long pips in the first place.
If you want deception and wobbly feeling toward the opponent, the ox version gives you the best chance.
After you are used to long pips ox, then you can always get another sheet with 0.5mmg of sponge and then go from there.
Using long pips (say ox) on the forehand side to attack, it is a bit weird. The reason is that in the modern game, with spin less of an issue, it is very hard to finish the point with long pips. The whole point of long pips, in most cases, is to use it to disrupt the opponent, from your BH side of long pips and once the ball pop up, you finish with your forehand (usually inverted or if you want to experiment, you can put a fast short pips rubber there) immediately. That's how you win.
Therefore using long pips usually requires you to learn to attack high balls very very well.
As for using long pips to attack, I cannot really think of anyone for you to imitate. If you want to use long pips on the FH side, check out some YouTube videos for some long pips penholder players from China and Japan, and see how they use long pips on the forehand side to set up their attacks. Those are interesting videos to look at.