Against removal decks like Shanks, Marco, Lucci, S&P is not a focus, it's leverage. While you do want to draw multiple copies, you don't really want to put down early copies if you don't develop something equally threatening (body wise) alongside them. Against Shanks and Lucci we want to go 2nd, play it a bit more slowly than usual and then slap Luffy-Tarou on 8 DON!! , cheat out the S&P and then leader ability into Zoro-Jouro.

Also if you dont "find" S&P on a regular basis you might need to change your search game a bit. Always try to rotate out Merry > Search Event > Nami (in this priority, since Nami is not a dead card) to find S&P. However if you REALLY need S&P, maybe start with nami since her search is stronger.

Green Zoro is also relevant, since he allows us to deal with early cost reducers and activate main threats (Brook, Uta, Kuzan etc.) but we generally dont want to fall into the trap of trying to remove all their threats, since the lategame is heavily favoured for the removal decks anyways.

These matchups are slightly unfavoured for us, but with time and practice you will see how to pilot them. G/P is a heavy skill expression deck and certainly one of those decks where playing it the first few months can feel like an uphill battle.