If we have 6 chapters to end this volume then I honestly could see Oda finishing Raizu’s fight in like two pages or so while the rest of the chapter focus on Zoro for example and we do the same in the following chapter, but with Drake/Apoo fight while the most focus on Sanji/Queen. After finishing the two small fights while still giving justice to both Zoro and Sanji we keep going with the rest of the chapters left on the volume going back and forth between the two calamities fights till they are down for good. The next volume should focus a lot on the yonko fights.