What is the project?
Long pips generally use the opponents spin, rather than generating much spin of their own, but a couple I have tried that have some grip are Sunflex Icebreaker and Hallmark Destroyer.
It might also be worth looking at medium/half-long.
correct.
What the OP is asking for doesn't really make sense.
If they want to vary the spin the chops or be able to chop with heavy backspin or sometimes dead chop, medium or even a short pip would do the trick as there are choppers who use those. With those you can dictate the levels of spin more. LPs tends to just reverse & give back the spin based upon how heavy the loop was coming at you.
LPs are not designed to be grippy. The more grip you go on a LP, the less natural reversal it'll have. If you want grippier pips to make more spin you go shorter in length.
Be like asking for an attacking smooth rubber that doesn't grip the ball well. Inverted rubbers are designed to grip so you can spin & attack. Same by in large with LPs. they're designed to not grip so you get high reversal and it makes chopping easier vs heavy loops.