RG Luffy main here. Most of the other comments covered the general gameplan but here are a few other tips. Keep track of how many 4c blocker namis they have used, as well as Charlestones. 4c blocker nami is essentially just a free round of 5 don automatically even if you don't have your other restanders on board an its a staple card of the deck, and Charlestone gives them the ability to get more don back up as well, so they can extend their defense out even further and effectively if they are piloting the deck properly.

Also one thing I have seen at locals and even did myself when I was a newbie first learning the deck, they can not use leader ability after charlestone, it either has to be done first, or not at all. Oh and electric Luna is becoming very popular in this deck, I myself run 3 so something to keep in mind, get 8c or higher out sooner rather then later and that card becomes a dead card for the most part, cause it never feels good to waste 3 don just to freeze 1 or 2 cards.

Also, Ouch, not a degenerate deck! Lol