I usually do them ”early” like day before early, chill the beef, slice it cold (stays together better) put it in a pan with some of the reserved cooking broth, cover and reheat in the oven. Before feast time. That leaves you plenty of time to cook the “eating vegetables” in the reserved broth so they come out just right at feasting time.
Really, since it’s a braise, it’s not resting, it’s just keeping warm. The “juices“ don’t need to redistribute like they do in a roasted protein.
the above is the method my sister in law and I used for the church feasts for years and it really works well. I’m doing a slight variation on the technique, crockpot the beef overnight, remove to a hotel pan, chill strain the broth, chill that off as well de fat the next morning. Day off, prep fresh vegetables cook them either in stock or water. Cabbage and onions I tend to cook in the stock, I prefer Brussels sprouts and potatoes less overpowered by the seasoning in the beef stock.
So, that’s my plan for this weekends feasting!