Same here, I'm doing that itinerary in November.Yeah I think the best bet is to look for cruise compasses for this year and your specific route. I know I'd been looking for the Allure Western 4-port itinerary but that's a very recent one so they've been hard to come by. I've found all of one set on CC thus far.
You can also check this website https://www.royalcaribbeanblog.com/cruise-compassThank you, I will look for the Oasis Eastern Caribbean sailing and see what I come up with!